Martin, D. (1991). Geographic information systems and their socioeconomic applications. Routledge.
Παραπομπή σε μορφή Chicago (17η εκδ.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. London ; New York: Routledge, 1991.
Παραπομπή σε μορφή MLA (9th εκδ.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. Routledge, 1991.