Παραπομπή APA

Prithvish,Nag, & Smita,Sengupta. (2008). Introduction to geographical information system. Concept Publishing Company.

Παραπομπή Chicago Style

Prithvish,Nag, και Smita,Sengupta. Introduction to Geographical Information System. New Delhi: Concept Publishing Company, 2008.

Παραπομπή MLA

Prithvish,Nag, και Smita,Sengupta. Introduction to Geographical Information System. Concept Publishing Company, 2008.