Hernon, Peter, author
American Library Association, 2015
Buku Teks
editor, E. Dale Cluff
The Haworth Press , 1990
Buku Teks
Zeithaml, Valarie A., author
Free Press, 1990.
Buku Teks
Mates, Barbara T., author
[American Library association, American Library association], 2003
eBooks
edited by Alphonse F. Trezza
G.K. Hall, 1990
Buku Teks