Kern, M. Kathleen
Virtual reference best practices: tailoring services to your library
American Management Association, 2009
 eBooks
Ronan, Jana Smith
Chat reference: a guide to live virtual reference services
Libraries Unlimited, 2003
 Buku Teks SO
Ronan, Jana Smith
Chat reference : a guide to live virtual reference services
Libraries Unlimited, 2003
 Buku Referensi
Reference services and technical services : interactions in library practice
edited by Gordon Stevenson and Sally Stevenson
The Haworth Press , 1984
 Buku Teks SO
Service perspectives for the digital library remote reference services
 Artikel Jurnal