APA-referens (7:e uppl.)

Getis, A. a. (2006). Introduction to geography (10th ed.). McGraw - Hill.

Chicago-referens (17:e uppl.)

Getis, Arthur...[et al]. Introduction to Geography. 10th ed. Boston: McGraw - Hill, 2006.

MLA-referens (9:e uppl.)

Getis, Arthur...[et al]. Introduction to Geography. 10th ed. McGraw - Hill, 2006.