Παραπομπή APA

Singh, G. (2015). Academic library system and services. Ess Ess pub.

Παραπομπή Chicago Style

Singh, Gurdev. Academic Library System and Services. Newdelhi: Ess Ess pub, 2015.

Παραπομπή MLA

Singh, Gurdev. Academic Library System and Services. Ess Ess pub, 2015.