APA (7. basım) Alıntı

Worrall, L. (1990). Geographic information systems: Developments and applications. Belhaven Press.

Chicago Style (17. basım) Atıf

Worrall, Les. Geographic Information Systems: Developments and Applications. London ; New York: Belhaven Press, 1990.

MLA (9th ed.) Atıf

Worrall, Les. Geographic Information Systems: Developments and Applications. Belhaven Press, 1990.