एपीए उद्धरण

Obermeyer, N. J. (1994). Managing geographic information systems. New York: Guilford Press.

शिकागो स्टाइल उद्धरण

Obermeyer, Nancy J. Managing Geographic Information Systems. New York: Guilford Press, 1994.

एमएलए उद्धरण

Obermeyer, Nancy J. Managing Geographic Information Systems. New York: Guilford Press, 1994.