APA (7th ed.) Citation

Hubbard, P., Kitchin, R., & Valentine, G. (2008). Key texts in Human Geography. Sage.

Chicago Style (17th ed.) Citation

Hubbard, Phil, Rob Kitchin, and Gill Valentine. Key Texts in Human Geography. Los Angeles: Sage, 2008.

MLA (9th ed.) Citation

Hubbard, Phil, et al. Key Texts in Human Geography. Sage, 2008.