APA (7th ed.) Citation

Warren, H. C. (1921). A history of the association psychology. C. Scribner's Sons.

Chicago Style (17th ed.) Citation

Warren, Howard C. A History of the Association Psychology. New York, Chicago [et cetera]: C. Scribner's Sons, 1921.

MLA (9th ed.) Citation

Warren, Howard C. A History of the Association Psychology. C. Scribner's Sons, 1921.