Cita APA (7a ed.)

Guinness, P., & Nagle, G. (2009). Geography. Hodder Education.

Cita Chicago Style (17a ed.)

Guinness, Paul, y Garrett Nagle. Geography. London: Hodder Education, 2009.

Cita MLA (9a ed.)

Guinness, Paul, y Garrett Nagle. Geography. Hodder Education, 2009.