Cita APA (7th ed.)

Cummings, J. L., & Thomas, J. (2000). The value of psychological treatment: The collected papers of Nicholas A. Cummings. Zeig, Tucker & Co..

Cita Chicago (17th ed.)

Cummings, Janet L., i J.Lawrence Thomas. The Value of Psychological Treatment: The Collected Papers of Nicholas A. Cummings. Phoenix: Zeig, Tucker & Co., 2000.

Cita MLA (9th ed.)

Cummings, Janet L., i J.Lawrence Thomas. The Value of Psychological Treatment: The Collected Papers of Nicholas A. Cummings. Zeig, Tucker & Co., 2000.