APA (7th ed.) Citation

Clifford, N. J., & Valentine, G. (2010). Key methods in geography (2nd ed.). Sage.

Chicago Style (17th ed.) Citation

Clifford, Nicholas J., and Gill Valentine. Key Methods in Geography. 2nd ed. Thousand Oaks, CA: Sage, 2010.

MLA (9th ed.) Citation

Clifford, Nicholas J., and Gill Valentine. Key Methods in Geography. 2nd ed. Sage, 2010.