APA (7th ed.) Citation

De by, R. A. (2000). Principles of geographic information systems: An introductory textbook. International Institute for Aerospace Survey and Earth Sciences.

Chicago Style (17th ed.) Citation

De by, Rolf A. Principles of Geographic Information Systems: An Introductory Textbook. Enschede, Netherlands: International Institute for Aerospace Survey and Earth Sciences, 2000.

MLA (9th ed.) Citation

De by, Rolf A. Principles of Geographic Information Systems: An Introductory Textbook. International Institute for Aerospace Survey and Earth Sciences, 2000.