French, G. T. (1996). Understanding the GPS: An introduction to the Global Positioning System : what it is and how it works. GeoResearch.
Chicago-Zitierstil (17. Ausg.)French, Gregory T. Understanding the GPS: An Introduction to the Global Positioning System : What It Is and How It Works. Bethesda, MD: GeoResearch, 1996.
MLA-Zitierstil (9. Ausg.)French, Gregory T. Understanding the GPS: An Introduction to the Global Positioning System : What It Is and How It Works. GeoResearch, 1996.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.