Παραπομπή APA

Maguire, D. J., Goodchild, M. F., & Rhind, D. (1991). Geographical information systems: Principles and applications. Harlow: Longman Scientific & Technical.

Παραπομπή Chicago Style

Maguire, David J., Michael F. Goodchild, and David Rhind. Geographical Information Systems: Principles and Applications. Harlow: Longman Scientific & Technical, 1991.

Παραπομπή MLA

Maguire, David J., Michael F. Goodchild, and David Rhind. Geographical Information Systems: Principles and Applications. Harlow: Longman Scientific & Technical, 1991.

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