Παραπομπή σε μορφή APA (7η εκδ.)

Longley, P. A. (2005). Geographical information systems: Principles, techniques, management, and applications (2nd ed., abridged.). John Wiley & Sons.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Longley, Paul A. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. Hoboken, N.J.: John Wiley & Sons, 2005.

Παραπομπή σε μορφή MLA (8th εκδ.)

Longley, Paul A. Geographical Information Systems: Principles, Techniques, Management, and Applications. 2nd ed., abridged. John Wiley & Sons, 2005.