Cita APA (7th ed.)

Martin, D. (1991). Geographic Information Systems and Their Socioeconomic Applications. Routledge.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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