Loertscher, David V., author
Hi Willow Research & Publishing, 2009
Buku Referensi
Kohn, Karen C., 1978, author
Rowman & Littlefield, 2015
Buku Teks
Disher, Wayne, author
Libraries Unlimited, 2007
Buku Teks
Johnson, Peggy
[American Management Association, ], 2009
eBooks
Johnson, Peggy, author
American Library Association, 2014
Buku Teks