См. J. E. Marcia. “Development and Validation of Ego-Identity Status” / Journal of Personality and Social Psychology 3 (1966): 551–558; J. E. Cote, S. J. Schwartz. “Comparing Psychological and Social Approaches to Identity: Identity Status, Identity Capital, and the Individualization Process” / Journal of Adolescence 25 (2002): 571–586; S. J. Schwartz, J. E. Cote, J. J. Arnett, “Identity and Agency in Emerging Adulthood: Two Developmental Routes in the Individuation Process” / Youth Society 2 (2005): 201–220.