Παραπομπή APA
Longley, P. (2005). Geographical information systems: Principles, techniques, management, and applications (2nd ed., abridged.). Hoboken, N.J.: John Wiley & Sons.
Παραπομπή Chicago StyleLongley, Paul. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. Hoboken, N.J.: John Wiley & Sons, 2005.
Παραπομπή MLALongley, Paul. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. Hoboken, N.J.: John Wiley & Sons, 2005.
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