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.
Atenció: Aquestes cites poden no estar 100% correctes.