LAURINI, R., & THOMPSON, D. (1993). Fundamentals of spatial information systems. Academic Press.
Cita Chicago (17th ed.)LAURINI, Robert, i Derek THOMPSON. Fundamentals of Spatial Information Systems. California: Academic Press, 1993.
Cita MLA (9th ed.)LAURINI, Robert, i Derek THOMPSON. Fundamentals of Spatial Information Systems. Academic Press, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.