APA (7th ed.) Citation

Barker, L. F. (1940). Psychotherapy. D. Appleton-Century Company, Inc.

Chicago Style (17th ed.) Citation

Barker, L. F. Psychotherapy. New York: D. Appleton-Century Company, Inc, 1940.

MLA (9th ed.) Citation

Barker, L. F. Psychotherapy. D. Appleton-Century Company, Inc, 1940.