APA (7th ed.) Citation

Wentzel, K. R., & Wigfield, A. (2009). Handbook of motivation at school. Routledge.

Chicago Style (17th ed.) Citation

Wentzel, Kathryn R., and Allan Wigfield. Handbook of Motivation at School. New York: Routledge, 2009.

MLA (9th ed.) Citation

Wentzel, Kathryn R., and Allan Wigfield. Handbook of Motivation at School. Routledge, 2009.