एपीए उद्धरण

Joseph P Stoltman. (2012). 21st century geography: A reference handbook (vol.1). Sage.

शिकागो स्टाइल उद्धरण

Joseph P Stoltman. 21st Century Geography: A Reference Handbook (vol.1). Los Angeles: Sage, 2012.

एमएलए उद्धरण

Joseph P Stoltman. 21st Century Geography: A Reference Handbook (vol.1). Sage, 2012.