APA (7th ed.) Citation

Warren, H. C. (1922). Elements of human psychology. Houghton Mifflin company.

Chicago Style (17th ed.) Citation

Warren, Howard C. Elements of Human Psychology. New York [etc.]: Houghton Mifflin company, 1922.

MLA (8th ed.) Citation

Warren, Howard C. Elements of Human Psychology. Houghton Mifflin company, 1922.