APA (7th ed.) Citation

Bernhardsen, T. (1992). Geographic information systems. Geoinformation International.

Chicago Style (17th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems. Arendal: Geoinformation International, 1992.

MLA (8th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems. Geoinformation International, 1992.

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