Clayton, Peter, author
Library Association Publishing, 2001
Buku Teks
Artikel Jurnal
Rhyno, Art, author
Libraries Unlimited, 2004
Buku Teks
University of Texas Press,
Majalah, Jurnal, Buletin
Katz, Bill, author
R.R. Bowker Company, 1986
Buku Referensi