APA (7th ed.) Citation

Gill, Phythian, & Marrin. (2008). Intelligence theory: Key questions and debates. Routledge.

Chicago Style (17th ed.) Citation

Gill, Phythian, and Marrin. Intelligence Theory: Key Questions and Debates. New York: Routledge, 2008.

MLA (8th ed.) Citation

Gill, et al. Intelligence Theory: Key Questions and Debates. Routledge, 2008.