Cita APA (7a ed.)

Walen, S. R., DiGiuseppe, R., & Wessler, R. L. (1980). A practitioner's guide to rational-emotive therapy. Oxford University Press.

Cita Chicago Style (17a ed.)

Walen, Susan R., Raymond DiGiuseppe, y Richard L. Wessler. A Practitioner's Guide to Rational-emotive Therapy. New York [etc.]: Oxford University Press, 1980.

Cita MLA (9a ed.)

Walen, Susan R., et al. A Practitioner's Guide to Rational-emotive Therapy. Oxford University Press, 1980.