APA (7th ed.) Citation

Heywood, D. I., Cornelius, S., & Carver, S. (2011). An introduction to geographical information systems (4th ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Heywood, D. Ian, Sarah Cornelius, and Steve Carver. An Introduction to Geographical Information Systems. 4th ed. Harlow, England ; N.Y.: Prentice Hall, 2011.

MLA (9th ed.) Citation

Heywood, D. Ian, et al. An Introduction to Geographical Information Systems. 4th ed. Prentice Hall, 2011.