APA (7th ed.) Citation

Ekman, P., Ekman, M. A. M., & Ekman, T. (1989). Why kids lie: How parents can encourage truthfulness. Penguin Books.

Chicago Style (17th ed.) Citation

Ekman, Paul, Mary Ann Mason Ekman, and Tom Ekman. Why Kids Lie: How Parents Can Encourage Truthfulness. New York: Penguin Books, 1989.

MLA (9th ed.) Citation

Ekman, Paul, et al. Why Kids Lie: How Parents Can Encourage Truthfulness. Penguin Books, 1989.