Maxell, Robert L., author
American Library Association, 2002
Buku Referensi
Maxwell, Robert L., author
American Library Association, 2002
Buku Teks
Sennet, Richard, author
Alfred A. Knopf, 1980
Buku Teks
Ferguson, Bobby, author
Libraries Unlimited, 2005
Buku Referensi
Eckstein, Harry, author
John Wiley & Sons, 1975
Buku Teks