APA (7th ed.) Citation

Zimbardo, Weber, & Johnson. (2000). Psychology (3rd ed.). Allyn and Bacon.

Chicago Style (17th ed.) Citation

Zimbardo, Weber, and Johnson. Psychology. 3rd ed. London: Allyn and Bacon, 2000.

MLA (8th ed.) Citation

Zimbardo, et al. Psychology. 3rd ed. Allyn and Bacon, 2000.