Cita APA (7th ed.)

By, R. A., Sc, M. E. B., Kainz, D., Knippers, R., Kraak, M., Krol, B., . . . Van Westen, C. (1999). Principles of geographic information systems: ITC core module. International Institute Aerospace Survey and Earth Sciences (ITC).

Cita Chicago (17th ed.)

By, Rolf A., et al. Principles of Geographic Information Systems: ITC Core Module. Enschede, The Netherlands: International Institute Aerospace Survey and Earth Sciences (ITC), 1999.

Cita MLA (9th ed.)

By, Rolf A., et al. Principles of Geographic Information Systems: ITC Core Module. International Institute Aerospace Survey and Earth Sciences (ITC), 1999.