APA

Freud S., . (1965). Group psychology and the analysis of the ego. New York: Bantam Matrix.

Chicago

Freud Sigmund, . 1965. Group psychology and the analysis of the ego. New York: Bantam Matrix.

Harvard

Freud S., . (1965). Group psychology and the analysis of the ego. New York: Bantam Matrix.

MLA

Freud Sigmund, . Group psychology and the analysis of the ego. New York: Bantam Matrix. 1965.