APA (7th ed.) Citation

Freud, S. (1965). Group psychology and the analysis of the ego. Bantam Books.

Chicago Style (17th ed.) Citation

Freud, Sigmund. Group Psychology and the Analysis of the Ego. New York: Bantam Books, 1965.

MLA (9th ed.) Citation

Freud, Sigmund. Group Psychology and the Analysis of the Ego. Bantam Books, 1965.

Warning: These citations may not always be 100% accurate.