1. Berube, L. (2003). Digital reference overview: An issue paper from the Networked Services Policy Task Group. Retrieved from http://www.ukoln.ac.uk/public/nsptg/virtual/
2. Borchardt, K., & Croud, J. A. (2001, May 20-23). Digital reference service: A new service or the next logical step? Paper presented at Educause: The Power of 3. Australia, Griffith University.
3. A Blueprint for Building Online Reference Knowledge Bases
4. Chandwani, A. (2010, January 6-7). An overview of digital reference service. In Proceedings of UGC Sponsored National Conference, Nagpur, India. Retrieved from http://eprints.rclis.org/14295/1/digital_reference_services.pdf