APA (7th ed.) Citation

Frankl, V. E., & Crumbaugh, J. C. (1967). Psychotherapy and existentialism: Selected papers on logotherapy. Simon and Schuster.

Chicago Style (17th ed.) Citation

Frankl, Viktor E., and James C. Crumbaugh. Psychotherapy and Existentialism: Selected Papers on Logotherapy. New York: Simon and Schuster, 1967.

MLA (9th ed.) Citation

Frankl, Viktor E., and James C. Crumbaugh. Psychotherapy and Existentialism: Selected Papers on Logotherapy. Simon and Schuster, 1967.