APA (7th ed.) Citation

Singer, E. (1970). Key concepts in psychotherapy (2nd ed.). Basic books.

Chicago Style (17th ed.) Citation

Singer, Erwin. Key Concepts in Psychotherapy. 2nd ed. New York: Basic books, 1970.

MLA (9th ed.) Citation

Singer, Erwin. Key Concepts in Psychotherapy. 2nd ed. Basic books, 1970.