Carr, A. (2007). Positive psychology. Tehran: Roshd Publication.
Donaldson, S.I., Dollwet, M., & Rao ,M.A. (2014). Happiness, excellence, and optimal human functioning: Examining the peer-reviewed literature linked to positive psychology. Journal of Positive Psychology, 10(3), 95-185.
DuBrin, A. J. (2004). Applying psychology: Individual and organizational effectiveness. Prentice Hall.
Effert, B.R., (1989). Decisional procrastination: Examining personality correlates. Journal of Sociology Behavior, 4(1), 15-25.
Fee, R.L., Tangney, J.P. (2012). Procrastination: A means of avoiding shame or guilt?. Journal of Social Behavior, 15(5), 167-175.
Ferrari, J.R. (1994). Dysfunctional procrastination and its relationship with self-esteem, interpersonal dependency, and self-defeating behaviors. Individual Differences, 17(5), 673–685.
Glick, D.M., Millstein, D.J, & Orsillo, S.M. (2014). A preliminary investigation of the role of psychological inflexibility in academic procrastination. Journal of Context Behavior, 3(2),81–90.
Grunschel, C., Patrzek, J., (2013). Exploring different types of academic delayers: A latent profile analysis. Individual Differences, 23, 225–233.
Kagan, M., Cakır, O., Ilhan, T., & Kandemir, M. (2012). The explanation of the academic procrastination behavior of university students with perfectionism, obsessive – compulsive and five factor personality traits. Sociological Behavior, 2(1), 211-220.
Kandemir, M.(2014). Reasons of academic procrastination: Self-regulation, academic self-efficacy, life satisfaction and demographics variables. Sociological Behavior, 1(15), 188–193.
Lay, C., Silverman, S. (1996). Trait procrastination, anxiety, and dilatory behavior. Individual Differences, 21(1), 61–67.
Lay, C.H., & Schouwenburg, H.C. (1993). Trait procrastination, time management, and academic behavior. Journal of Social Behavior, 8(4), 647-652.
Neenan, M. (2008). Tackling procrastination: An REBT perspective for coaches. Journal of Emotional Behavior, 26(1), 53–62.
Rashid, T. (2007). A positive psychotherapy for young adults and children. Journal of Positive Psychology, 37, 325–331.
Seligman, M.E., Ernst, R.M., Gillham, J., Reivich, K., & Linkins, M. (2009). Positive education: positive psychology and classroom interventions. Oxford Education, 35(3), 293–311.
Seligman, M.P, Rashid, T., Parks,A.C. (2006). Positive psychotherapy. Psychological Journal, 61(8), 774–788.
Seligman, M.P, Steen, T.A, Park, N., & Peterson, C. (2005). Positive psychology progress: Empirical Validation of Interventions. Psychological Journal, 60(5), 410–421.
Seligman, M.P. (2005). Optimistic children. Tehran: Roshd Publication.
Steel, P. (2007). The nature of procrastination: a meta-analytic and theoretical review of quintessential self-regulatory failure. Psychological Bulletin, 133(1):65–94.
Vakili, M. (2009). The effectiveness of group therapy on Adjustment of male high school students in Karaj city. Tehran: Allame Tabatabaei University.
Wong, S. S. (2012). Negative thinking versus positive thinking in a Singaporean student sample: Relationships with psychological well-being and psychological maladjustment, Learning Individual Difference, 22(1), 76–82.