Παραπομπή APA

Obermeyer, N. J. (1994). Managing geographic information systems. Rawat Publications.

Παραπομπή Chicago Style

Obermeyer, Nancy J. Managing Geographic Information Systems. Jaipur: Rawat Publications, 1994.

Παραπομπή MLA

Obermeyer, Nancy J. Managing Geographic Information Systems. Rawat Publications, 1994.