Singh, G. (2015). Academic library system and services. Ess Ess pub.
Chicago Style aipamenaSingh, Gurdev. Academic Library System and Services. Newdelhi: Ess Ess pub, 2015.
MLA aipamenaSingh, Gurdev. Academic Library System and Services. Ess Ess pub, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.