APA

Frankl V. E., Crumbaugh J. C., . (1967). Psychotherapy and existentialism: selected papers on logotherapy. New York: Washington Square Press.

Chicago

Frankl Viktor Emil, Crumbaugh James C, . 1967. Psychotherapy and existentialism: selected papers on logotherapy. New York: Washington Square Press.

Harvard

Frankl V. E., Crumbaugh J. C., . (1967). Psychotherapy and existentialism: selected papers on logotherapy. New York: Washington Square Press.

MLA

Frankl Viktor Emil, Crumbaugh James C, . Psychotherapy and existentialism: selected papers on logotherapy. New York: Washington Square Press. 1967.