Παραπομπή APA
Maguire, D. J., Goodchild, M. F., & Rhind, D. (1991). Geographical information systems: Principles and applications. Harlow: Longman Scientific & Technical.
Παραπομπή Chicago StyleMaguire, David J., Michael F. Goodchild, and David Rhind. Geographical Information Systems: Principles and Applications. Harlow: Longman Scientific & Technical, 1991.
Παραπομπή MLAMaguire, David J., Michael F. Goodchild, and David Rhind. Geographical Information Systems: Principles and Applications. Harlow: Longman Scientific & Technical, 1991.
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