Παραπομπή APA

Singh S. P. (2009). Classification and catalouging in digital libraries. Omega.

Παραπομπή Chicago Style

Singh S. P. Classification and Catalouging in Digital Libraries. New Delhi: Omega, 2009.

Παραπομπή MLA

Singh S. P. Classification and Catalouging in Digital Libraries. Omega, 2009.