Longley, P. A. (2005). Geographical information systems: Principles, techniques, management, and applications (2nd ed., abridged.). John Wiley & Sons.
Chicago-Zitierstil (17. Ausg.)Longley, Paul A. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. Hoboken, N. J: John Wiley & Sons, 2005.
MLA-Zitierstil (9. Ausg.)Longley, Paul A. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. John Wiley & Sons, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.