Cita APA (7th ed.)
ebrary, Inc, & Dawsen, C. J. (2011). Geographic information systems. Nova Science Publishers.
Cita Chicago (17th ed.)
ebrary, Inc, i Christopher J. Dawsen. Geographic Information Systems. New York: Nova Science Publishers, 2011.
Cita MLA (9th ed.)
ebrary, Inc, i Christopher J. Dawsen. Geographic Information Systems. Nova Science Publishers, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.