Laurinni, R., & Thompson, D. Fundamentals of spatial Information systems.
Cita Chicago (17th ed.)Laurinni, Robert, i Dereck Thompson. Fundamentals of Spatial Information Systems.
Cita MLA (8th ed.)Laurinni, Robert, i Dereck Thompson. Fundamentals of Spatial Information Systems.
Atenció: Aquestes cites poden no estar 100% correctes.