APA (7th ed.) Citation

(2011). 21st century geography, Volume 1 & 2: A reference handbook. SAGE Publications.

Chicago Style (17th ed.) Citation

21st Century Geography, Volume 1 & 2: A Reference Handbook. Thousand Oaks, CA: SAGE Publications, 2011.

MLA (9th ed.) Citation

21st Century Geography, Volume 1 & 2: A Reference Handbook. SAGE Publications, 2011.

Warning: These citations may not always be 100% accurate.