Katz, Wiliiam A.
Introduction to reference work : volume II, reference services and reference processes / William A. Katz
McGraw-Hill, 1992
 Buku Referensi
Palmer, Roger C.
Online reference and information retrieval / Roger C. Palmer
Libraries Unlimited, 1987
 Buku Referensi
Katz, William A., 1924-
Introduction to reference work
McGraw-Hill, 2002
 Buku Teks
Bopp, Richard E.
Reference and information services : an introduction
Libraries Unlimited, 2001
 Buku Teks
Owen, Tim Buckley, 1948-
Success at the enquiry desk: successful enquiry answering - every time
Facet Publishing, 2006
 Buku Teks