Adeli, V. (2012). The evolution of the issue of "meaning of life". Presented at the First International Congress on Culture and Religious Thought. (In Persian)
Ahmadi, S., Heydari, M., Bagherian, F., & Kashfi, A. R. (2016). Adolescence and meaning transformation: A comparison of sources and dimensions of meaning in life in adolescent girls and boys. Clinical Psychology Studies, 6(23), 149-178. (In Persian)
Arzu, C .2010. "Meaning of lifes as a mental concept". Thesis of mastery of arts in philosophy. In partial fulfillment of the requirements.
Berk, L. E. (2008). Developmental psychology (Vol. 2). (Y. Sayyid Mohammadi, Trans.). Arasbaran Publishing. (In Persian)
Budhwar, L., Reeves, D., & Farrell, P. (2000). Life goals as a function of social class and child rearing practice in India. International Journal of Intercultural Relations, 24, 227-245.
Çamur, A. (2010). Meaning of life as a mental concept. [Master's thesis, In partial fulfillment of the requirements].
Dadfar, R., Bazdar, F., Nasrollahi, A., Abdolhosseini, A., & Ahmadi, V. (2013). Investigating family factors affecting academic failure of male and female high school students in Darehshahr city in the academic year 2011-2012. Journal of Ilam University of Medical Sciences, 21(6), 224-231. (In Persian)
Dehdari, T., Yarahmadi, R., Taghdisi, M. H., Daneshvar, R., & Ahmadpour, J. (2013). The relationship between having meaning in life and the status of stress, anxiety, and depression among students of Iran University of Medical Sciences in 2013. Quarterly Journal of Health Education and Health Promotion, 1(3), 83-92. (In Persian)
Duff, L., & Ivlevs, A. (2009). Happiness, meaning of life and income. Paper provided by University of the West of England, Department of Economics in its series Discussion Papers.
Gholamali Lavasani, M., Ezhei, J., & Mohammadi Mosairi, F. (2013). The relationship between meaning in life and optimism with subjective well-being. Journal of Applied Psychology, 17(1), 3-17. [In Persian]
Haghighatian, M., Haghighat, F., Ghoreishi, S. R., & Mohsenipour, P. (2011). The effect of family relationships on the mental health of children in Isfahan city. Journal of Health System Research, 7(3), 353-363. (In Persian)
Hajloo, N., Rezaei Sharif, A., & Vahedi, S. (2012). Correlates of individual identity formation in female high school students in Ardabil city. School Psychology, 1(2), 21-38. (In Persian)
Isik, S., & Uzbe, N. (2015). Personality traits and positive/negative affects: An analysis of meaning in life among adults. Educational Sciences: Theory & Practice, 3, 587-595.
Karamati, A., & Mehrab, B. (2012). An analysis of jokes exchanged by female middle school students in terms of alignment with educational goals. Quarterly Journal of Educational Psychology Studies, 13, 103-122. (In Persian)
King, L. A., Hicks, J. A., Krull, J. L., & Del Gaiso, A. K. (2006). Positive affect and the experience of meaning in life. Journal of Personality and Social Psychology, 90(1), 179-196.
Lavigne, M. K., Hofman, S., Ring, A. J., Ryder, A. G., & Woodward, T. S. (2013). The personality of meaning in life: Associations between dimension of life meaning and the Big Five. The Journal of Positive Psychology, 8(1), 34-43.
Lavigne,M.K; Hofman,S; Ring, A.J; Ryder,A.G & Woodward, T.S (2013). "The personality of meaning in life: association between dimension of life meaning and the big five". The Journal of positive psychology, vol.8. No,1.PP: 34-43.
Lotfabadi, H. (2007). Educational psychology. SAMT Publications. (In Persian)
Majdi, F. (2010). Investigating the relationship between meaning in life and mothers' parenting styles and their children's behavioral disorders. [Master's thesis in General Psychology, University of Isfahan]. (In Persian)
Mokhtari, Z., & Mirmahdi, S. R. (2015). The relationship between sensation seeking and risky behaviors in adolescents in Hamadan city. Hamadan Law Enforcement Quarterly, 2(1), 21-44. (In Persian)
Nabavi, A. H., Navah, A. R., & Amirshirzad, N. (2014). Investigating effective factors on social indifference (Case study: Citizens over 18 years old in Dezful city). Journal of Iranian Sociology, 15(3), 132-161. (In Persian)
Nadi, M. A., & Sajjadian, I. (2012). Comparing the cognitive development of students in their perception of meaning in life. Knowledge and Research in Applied Psychology, 13(1), 18-27. (In Persian)
Nasiri, H., & Jokar, A. (2008). Meaning in life, hope, life satisfaction, and mental health in women (A group of employed cultural women). Journal of Women's Research, 6(2), 157-176. (In Persian)
Neundorf, K. A. (2016). The content analysis guidebook. (H. Bakhshi & V. Jalaiyan Bakhshande, Trans.). Jihad Daneshgahi Mashhad Publications. (In Persian)
Oishi, S., & Diener, E. (2014). Residents of poor nations have a greater sense of meaning in life than residents of wealthy nations. Psychological Science, 25(2), 422-430.
Riffe, D., Lacy, S., & Fico, F. G. (2002). Analyzing media messages. (M. Boroujerdi Alavi, Trans.). Soroush Publications. (In Persian)
Seifzadeh, A. (2016). Investigating the relationship between socioeconomic status and health in old age (Case study: Azarshahr). Quarterly Journal of Nursing for Vulnerable Groups, 3(7), 12-23. (In Persian)
Serafzadeh, S. H., & Rahimi, F. (2013). The relationship between religiosity and meaning in life in a student population. Culture Strategy, 24, 7-30. (In Persian)
Shafiabadi, A. (2008). Theories of counseling and psychotherapy. Jihad Daneshgahi Publications. (In Persian)
Showalter, S. M., & Wagener, L. M. (2000). Adolescent's meaning in life: A replication of Devogler and Ebersole (1983). Psychological Reports, 87, 115-126.
Showalter, Sh.M & wagener, L.M .2000. "Adolescent’s meaning in life: a replication of Devogler and Ebersole (1983)". Psychological reports,No, 87. PP:115-126.
Urata, Y. (2015). A psychological model to determine meaning in life and meaning of life. Journal of Philosophy of Life, 5(3), 215-227.