APA

Berne E., . (1966). Principles of group treatment. New York: Oxford University Press.

Chicago

Berne Eric, . 1966. Principles of group treatment. New York: Oxford University Press.

Harvard

Berne E., . (1966). Principles of group treatment. New York: Oxford University Press.

MLA

Berne Eric, . Principles of group treatment. New York: Oxford University Press. 1966.