APA-referens (7:e uppl.)

GEOGRAPHICAL & MAGUIRE, D. J. [. (1991). Geographical information systems: Principles and appli-cations. Longman.

Chicago-referens (17:e uppl.)

GEOGRAPHICAL och David J [ed] MAGUIRE. Geographical Information Systems: Principles and Appli-cations. New York: Longman, 1991.

MLA-referens (9:e uppl.)

GEOGRAPHICAL och David J [ed] MAGUIRE. Geographical Information Systems: Principles and Appli-cations. Longman, 1991.