APA (7th ed.) Citation

Bernhardsen, T. (1992). Geographic information systems. Viak IT.

Chicago Style (17th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems. Arendal: Viak IT, 1992.

MLA (9th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems. Viak IT, 1992.

Warning: These citations may not always be 100% accurate.