APA (7th ed.) Citation

SAGE Knowledge (Online service), Hubbard, P., Kitchin, R., & Valentine, G. (2008). Key texts in human geography. SAGE.

Chicago Style (17th ed.) Citation

SAGE Knowledge (Online service), Phil Hubbard, Rob Kitchin, and Gill Valentine. Key Texts in Human Geography. Los Angeles, [Calif.], London: SAGE, 2008.

MLA (9th ed.) Citation

SAGE Knowledge (Online service), et al. Key Texts in Human Geography. SAGE, 2008.