Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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