Cita APA (7th ed.)
(2002). An introduction to geographical information systems (2nd ed.). Prentice Hall ; Dorling Kindersley.
Cita Chicago (17th ed.)
An Introduction to Geographical Information Systems. 2nd ed. Harlow, England ; New York ; New Deli: Prentice Hall ; Dorling Kindersley, 2002.
Cita MLA (9th ed.)
An Introduction to Geographical Information Systems. 2nd ed. Prentice Hall ; Dorling Kindersley, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.