Cita APA (7a ed.)

Erikson, E. H. (1980). Identity and the life cycle. W.W. Norton & Company.

Cita Chicago Style (17a ed.)

Erikson, Erik H. Identity and the Life Cycle. New York ; London: W.W. Norton & Company, 1980.

Cita MLA (9a ed.)

Erikson, Erik H. Identity and the Life Cycle. W.W. Norton & Company, 1980.