APA-referens

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

Chicago-stil citat

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

MLA-referens

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