Singh, G. (2015). Academic library system and services. Ess Ess pub.
استشهاد بنمط شيكاغوSingh, Gurdev. Academic Library System and Services. Newdelhi: Ess Ess pub, 2015.
MLA استشهادSingh, Gurdev. Academic Library System and Services. Ess Ess pub, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.