APA-referens (7:e uppl.)

Symonds, P. M. (1951). The ego and the self. Appleton-Century-Crofts.

Chicago-referens (17:e uppl.)

Symonds, Percival Mallon. The Ego and the Self. New York: Appleton-Century-Crofts, 1951.

MLA-referens (9:e uppl.)

Symonds, Percival Mallon. The Ego and the Self. Appleton-Century-Crofts, 1951.