Cassell, Kay Ann, author
Reference and information services in the 21st century : an introduction
Facet Publishing, 2006
 Buku Teks
Coffman, Steve, author
Going live: starting and running a virtual reference service
[American Library association, American Library association], 2003
 eBooks
The virtual reference desk: creating a reference future
David R. Lankes ... [and others]
Facet Publishing, 2006
 Buku Teks
Hirko, Buff, author
Virtual reference training: the complete guide to providing anytime, anywhere answers
[American Library association, American Library association], 2004
 eBooks
Personnel issues in reference services / edited by Bill Katz and Ruth A. Fraley
Haworth Press, 1986
 Buku Referensi
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