Παραπομπή APA

Heywood, I., & ...[et al.]. (2000). An introduction to geographical information systems. Addison Wesley.

Παραπομπή Chicago Style

Heywood, Ian, και ...[et al.]. An Introduction to Geographical Information Systems. England: Addison Wesley, 2000.

Παραπομπή MLA

Heywood, Ian, και ...[et al.]. An Introduction to Geographical Information Systems. Addison Wesley, 2000.