Cita APA (7th ed.)

Bernhardsen, T. (2014). Geographic Information Systems: An introduction. Wiley.

Cita Chicago (17th ed.)

Bernhardsen, Tor. Geographic Information Systems: An Introduction. New Delhi: Wiley, 2014.

Cita MLA (9th ed.)

Bernhardsen, Tor. Geographic Information Systems: An Introduction. Wiley, 2014.