Παραπομπή APA

Chopra Y L & Mamta Chopra. (2001). Challenges before Library and information science in the new millennium. Ess Ess Publications.

Παραπομπή Chicago Style

Chopra Y L και Mamta Chopra. Challenges Before Library and Information Science in the New Millennium. New Delhi: Ess Ess Publications, 2001.

Παραπομπή MLA

Chopra Y L και Mamta Chopra. Challenges Before Library and Information Science in the New Millennium. Ess Ess Publications, 2001.