APA (7th ed.) Zitazioa

Martin, D. (1991). Geographic information systems and their socioeconomic applications. Routledge.

Chicago Style (17th ed.) Zitazioa

Martin, David. Geographic Information Systems and Their Socioeconomic Applications. London ; New York: Routledge, 1991.

MLA (9th ed.) Zitazioa

Martin, David. Geographic Information Systems and Their Socioeconomic Applications. Routledge, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.