APA (7th ed.) Citation

Heywood, I., Cornelius, S., & Carver, S. (2011). An introduction to geographical information systems (4a. ed.). Pearson Education Limited.

Chicago Style (17th ed.) Citation

Heywood, Ian, Sarah Cornelius, and Steve Carver. An Introduction to Geographical Information Systems. 4a. ed. Essex: Pearson Education Limited, 2011.

MLA (9th ed.) Citation

Heywood, Ian, et al. An Introduction to Geographical Information Systems. 4a. ed. Pearson Education Limited, 2011.