APA (7th ed.) Citation

Sumner, R. (2001). World geography. Salem Press.

Chicago Style (17th ed.) Citation

Sumner, Raymond. World Geography. Pasadena, Calif.: Salem Press, 2001.

MLA (9th ed.) Citation

Sumner, Raymond. World Geography. Salem Press, 2001.

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