APA (7th ed.) Citation

Postman, L., & Egan, J. P. (1949). Experimental psychology: An introduction. Harper.

Chicago Style (17th ed.) Citation

Postman, Leo, and James P. Egan. Experimental Psychology: An Introduction. New York, NY: Harper, 1949.

MLA (9th ed.) Citation

Postman, Leo, and James P. Egan. Experimental Psychology: An Introduction. Harper, 1949.