Cita APA (7th ed.)

Burrough, P. A., & McDonnell, R. A. (2006). Principles of geographical systems (Primera edición.). Oxford University Press.

Cita Chicago (17th ed.)

Burrough, Peter A., i Rachael A. McDonnell. Principles of Geographical Systems. Primera edición. New York: Oxford University Press, 2006.

Cita MLA (8th ed.)

Burrough, Peter A., i Rachael A. McDonnell. Principles of Geographical Systems. Primera edición. Oxford University Press, 2006.