Παραπομπή APA

Clarke, K. C. (2003). Getting started with geographic information systems (4th ed.). Upper Saddle River, N.J.: Prentice Hall.

Παραπομπή Chicago Style

Clarke, Keith C. Getting Started With Geographic Information Systems. 4th ed. Upper Saddle River, N.J.: Prentice Hall, 2003.

Παραπομπή MLA

Clarke, Keith C. Getting Started With Geographic Information Systems. 4th ed. Upper Saddle River, N.J.: Prentice Hall, 2003.

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