APA (7th ed.) Citation

Heywood, D. I., Carver, S., & Cornelius, S. (1998). An introduction to geographical information systems. Addison Wesley Longman.

Chicago Style (17th ed.) Citation

Heywood, D. Ian, Steve Carver, and Sarah Cornelius. An Introduction to Geographical Information Systems. Harlow, Esssex, New York: Addison Wesley Longman, 1998.

MLA (9th ed.) Citation

Heywood, D. Ian, et al. An Introduction to Geographical Information Systems. Addison Wesley Longman, 1998.