International aspects of reference and information services
edited by Bill Katz; Ruth Fraley
The Haworth Press , 1987
 Buku Teks
Information brokers and reference services
edited by Robin Kinder; Bill Katz
The Haworth Press, 1988
 Buku Teks
Bopp, Richard E., author
Reference and information services : an introduction
Libraries Unlimited, 2001
 Buku Teks
Cassell, Kay Ann, author
Reference and information services : an introduction
Neal-Schuman, an imprint of the American Library Association, 2013
 Buku Teks
Cassell, Kay Ann, author
Reference and information services in the 21st century : an introduction
Facet Publishing, 2006
 Buku Teks
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