APA (7th ed.) Citation

Heywood, I., Cornelius, S., & Carver, S. (2002). An introduction to geographical information systems (4th ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Heywood, Ian, Sarah Cornelius, and Steve Carver. An Introduction to Geographical Information Systems. 4th ed. Harlow: Prentice-Hall, 2002.

MLA (8th ed.) Citation

Heywood, Ian, et al. An Introduction to Geographical Information Systems. 4th ed. Prentice-Hall, 2002.