APA (7th ed.) Citation

Longley, P. (1999). Geographical information systems (2nd ed.). Wiley.

Chicago Style (17th ed.) Citation

Longley, Paul. Geographical Information Systems. 2nd ed. New York: Wiley, 1999.

MLA (9th ed.) Citation

Longley, Paul. Geographical Information Systems. 2nd ed. Wiley, 1999.