Style de citation APA

Johnson, R. E. (1971). Existential man: The challenge of psychotherapy. Pergamon Press.

Style de citation Chicago

Johnson, Richard E. Existential Man: The Challenge of Psychotherapy. New York: Pergamon Press, 1971.

Style de citation MLA

Johnson, Richard E. Existential Man: The Challenge of Psychotherapy. Pergamon Press, 1971.