Cita APA

Heywood, I., Cornelius, S., & Carver, S. (2003). An Introduction to Geographical Information Systems (2nd ed.). Pearson Education (Singapore) Pte. Ltd.

Citación estilo Chicago

Heywood, Ian, Sarah Cornelius, and Steve Carver. An Introduction to Geographical Information Systems. 2nd ed. Delhi: Pearson Education (Singapore) Pte. Ltd, 2003.

Cita MLA

Heywood, Ian, et al. An Introduction to Geographical Information Systems. 2nd ed. Pearson Education (Singapore) Pte. Ltd, 2003.