Cita APA (7th ed.)
Chang, K. (2008). Introduction to geographic information systems (4th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. New York : New Delhi: McGraw-Hill, 2008.
Cita MLA (9th ed.)
Chang, Kang-Tsung. Introduction to Geographic Information Systems. 4th ed. McGraw-Hill, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.