APA (7th ed.) Citation

Marcia, J. E. (1993). Ego identity: A handbook for psychosocial research. Springer-Verlag.

Chicago Style (17th ed.) Citation

Marcia, J. E. Ego Identity: A Handbook for Psychosocial Research. New York: Springer-Verlag, 1993.

MLA (9th ed.) Citation

Marcia, J. E. Ego Identity: A Handbook for Psychosocial Research. Springer-Verlag, 1993.