Ronan, Jana Smith
Chat reference: a guide to live virtual reference services
Libraries Unlimited, 2003
 Buku Teks
The virtual reference desk: creating a reference future
David R. Lankes ... [and others]
Facet Publishing, 2006
 Buku Teks
Majchrzak, Tim A.
Improving software testing: technical and organizational developments
[Springer, ], 2012
 eBooks
Coffman, Steve
Going live: starting and running a virtual reference service
[American Library association, American Library association], 2003
 eBooks
Guest editorial: virtual reference, today and tomorrow
 Artikel Jurnal