APA ציטוט

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.

ציטוט MLA

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