Reference services for children and young adults
edited by Bill Katz and Ruth A. Fraley
The Haworth Press, 1983
 Buku Teks
Pugh, Mary Jo, author
Providing reference services for archives and manuscripts
The Society of American Archivists, 1992
 Buku Teks
Bielskas, Amanda, author
IM and SMS reference services for libraries
Facet, 2012
 Buku Teks
Ronan, Jana Smith
Chat reference : a guide to live virtual reference services / Jana Smith Ronan
Libraries Unlimited, 2003
 Buku Referensi
Service perspectives for the digital library remote reference services
 Artikel Jurnal
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