Dyfyniad APA

Martin, D. (1996). Geographic information systems: Socioeconomic applications (2nd ed.). Routledge.

Dyfyniad Arddull Chicago

Martin, David. Geographic Information Systems: Socioeconomic Applications. 2nd ed. London, New York: Routledge, 1996.

Dyfyniad MLA

Martin, David. Geographic Information Systems: Socioeconomic Applications. 2nd ed. Routledge, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.