APA (7th ed.) Citation

Heywood, I., Cornelius, S., & Carver, S. (2006). An introduction to geographical information systems (3rd ed.). Pearson.

Chicago Style (17th ed.) Citation

Heywood, Ian, Sarah Cornelius, and Steve Carver. An Introduction to Geographical Information Systems. 3rd ed. Harlow: Pearson, 2006.

MLA (8th ed.) Citation

Heywood, Ian, et al. An Introduction to Geographical Information Systems. 3rd ed. Pearson, 2006.