Citazione Stile APA (7a Edizione)

Longley, P. . A., & Maguire, D. J. (1999). Geographical information systems (2nd ed.). Wiley.

Citazione stile Chigago Style (17a edizione)

Longley, Paul A., e David J. Maguire. Geographical Information Systems. 2nd ed. New York: Wiley, 1999.

Citatione MLA (9a ed.)

Longley, Paul A., e David J. Maguire. Geographical Information Systems. 2nd ed. Wiley, 1999.