Cita APA

Bernhardsen, T. (2002). Geographic information systems an introduction: An introduction. New York, NY: Wiley.

Chicago Style Citation

Bernhardsen, Tor. Geographic Information Systems an Introduction: An Introduction. New York, NY: Wiley, 2002.

Cita MLA

Bernhardsen, Tor. Geographic Information Systems an Introduction: An Introduction. New York, NY: Wiley, 2002.

Atenció: Aquestes cites poden no estar 100% correctes.