APA Style

Freud,Sigmund. (1965). Group Psychology and the Analysis of the Ego . New York: United States of America.

Chicago Style

Freud,Sigmund. Group Psychology and the Analysis of the Ego. New York: United States of America, 1965. Text.

MLA Style

Freud,Sigmund. Group Psychology and the Analysis of the Ego. New York: United States of America, 1965. Text.

Turabian Style

Freud,Sigmund. Group Psychology and the Analysis of the Ego. New York: United States of America, 1965. Print.