APA (7th ed.) Citation

Phythian, M., Gill, P., & Marrin, S. Intelligence theory: Key questions and debates. Routledge.

Chicago Style (17th ed.) Citation

Phythian, Mark, Peter Gill, and Stephen Marrin. Intelligence Theory: Key Questions and Debates. London [u.a.]: Routledge.

MLA (9th ed.) Citation

Phythian, Mark, et al. Intelligence Theory: Key Questions and Debates. Routledge.