Gurdev Singh. (2015). Academic library system and services. Ess Ess Pub..
استشهاد بنمط شيكاغوGurdev Singh. Academic Library System and Services. New Delhi, India: Ess Ess Pub., 2015.
MLA استشهادGurdev Singh. Academic Library System and Services. Ess Ess Pub., 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.