Παραπομπή APA

Demers, M. N. (1997). Fundamentals of geographic information systems. John Wiley.

Παραπομπή Chicago Style

Demers, Michael N. Fundamentals of Geographic Information Systems. New York: John Wiley, 1997.

Παραπομπή MLA

Demers, Michael N. Fundamentals of Geographic Information Systems. John Wiley, 1997.