एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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