APA (7th ed.) Citation

Paul, I. H. (1973). Letters to Simon: On the conduct of psychoterapy (2nd printing.). International Universities Press.

Chicago Style (17th ed.) Citation

Paul, Irving H. Letters to Simon: On the Conduct of Psychoterapy. 2nd printing. New York: International Universities Press, 1973.

MLA (9th ed.) Citation

Paul, Irving H. Letters to Simon: On the Conduct of Psychoterapy. 2nd printing. International Universities Press, 1973.