APA (7th ed.) Zitazioa

Edited by Clifford, N. J. (2009). Key Concepts in Geography (2nd ed.). Sage.

Chicago Style (17th ed.) Zitazioa

Edited by Clifford, Nicholas J. Key Concepts in Geography. 2nd ed. Chennai: Sage, 2009.

MLA (9th ed.) Zitazioa

Edited by Clifford, Nicholas J. Key Concepts in Geography. 2nd ed. Sage, 2009.