APA (7th ed.) Citation

Engle, T. L., & Snellgrove, L. (1989). Psychology: Its principles and applications (9th edition.). Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Engle, T. L., and Louis Snellgrove. Psychology: Its Principles and Applications. 9th edition. Orlando: Harcourt Brace Jovanovich, 1989.

MLA (8th ed.) Citation

Engle, T. L., and Louis Snellgrove. Psychology: Its Principles and Applications. 9th edition. Harcourt Brace Jovanovich, 1989.