MLA

Foulkes, S. H, and Elwyn James Anthony. Group Psychotherapy : the Psycho-analytic Approach. Harmondsworth: Penguin books, 1957.

APA

Foulkes, S. H, & Anthony, E. James. (1957). Group psychotherapy : the psycho-analytic approach. Harmondsworth: Penguin books.

Chicago

Foulkes, S. H., and Elwyn James Anthony. Group Psychotherapy: The Psycho-Analytic Approach. Harmondsworth: Penguin books, 1957.