APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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