Usherwood, Bob, author
Library Association, 1981
Buku Teks
Library Association Publishing, 1999
Buku Referensi
Greiner, Joy M., author
Libraries Unlimited, 2004
Buku Teks
Chandos , 2013
eBooks
William Miller; Rita M. Pellen
The Hawort Information Press, 2005
Buku Teks