Cita APA (7th ed.)

Ripple, W. J. (1989). Fundamentals of geographic information systems: A compendium. American Society for Photogrammetry and Remote Sensing, and American Congress on Surveying and Mapping.

Cita Chicago (17th ed.)

Ripple, William J. Fundamentals of Geographic Information Systems: A Compendium. Bethesda, Md: American Society for Photogrammetry and Remote Sensing, and American Congress on Surveying and Mapping, 1989.

Cita MLA (9th ed.)

Ripple, William J. Fundamentals of Geographic Information Systems: A Compendium. American Society for Photogrammetry and Remote Sensing, and American Congress on Surveying and Mapping, 1989.