Cita APA (7a ed.)

Ali, A. (2004). Reference service and the digital sources of information. Ess Ess Publications.

Cita Chicago Style (17a ed.)

Ali, Amjad. Reference Service and the Digital Sources of Information. New Delhi: Ess Ess Publications, 2004.

Cita MLA (9a ed.)

Ali, Amjad. Reference Service and the Digital Sources of Information. Ess Ess Publications, 2004.