Παραπομπή APA

Worboys, M., & Duckham, M. (2004). GIS: A computing perspective. CRC press.

Παραπομπή Chicago Style

Worboys, Michael, και Matt Duckham. GIS: A Computing Perspective. New York: CRC press, 2004.

Παραπομπή MLA

Worboys, Michael, και Matt Duckham. GIS: A Computing Perspective. CRC press, 2004.