Mortimer, Mary, author
TotalRecall Publications, 2007
Buku Teks
Raju, Jaya, author
Chandos, 2006
Buku Teks
Holzberlein, Deanne
Haworth Press, 1986
Buku Referensi
Edited by Cecilia Genereux, Paul D. Moeller
Libraries Unlimited, 2009
Buku Referensi
Leong, Carol L. H.
American Library Association, 1989
Buku Referensi