APA (7th ed.) Citation

Clifford, N., French, S., & Valentine, G. (2010). Key methods in Geography (2a. ed.). Sage.

Chicago Style (17th ed.) Citation

Clifford, Nicholas, Shaun French, and Gill Valentine. Key Methods in Geography. 2a. ed. Los Angeles: Sage, 2010.

MLA (9th ed.) Citation

Clifford, Nicholas, et al. Key Methods in Geography. 2a. ed. Sage, 2010.