Παραπομπή APA
Clarke, K. C. (2003). Getting started with geographic information systems. Upper Saddle River: Pearson Education.
Παραπομπή Chicago StyleClarke, Keith C. Getting Started With Geographic Information Systems. Upper Saddle River: Pearson Education, 2003.
Παραπομπή MLAClarke, Keith C. Getting Started With Geographic Information Systems. Upper Saddle River: Pearson Education, 2003.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.