revised and update by Sandy Norman
Library Association Publishing, 1999
Buku Teks
Pedley, Paul, author
Aslib, 2000
Buku Teks
Facet Publishing, 2004
Buku Teks
Goldstein, Paul, author
Little, Brown and Company, 1994
Buku Teks
Goldstein, Paul, author
Little, Brown, 1989
Buku Teks