Byrd, Patricia
Prentice-Hall, 1981
Buku Referensi
edited by Edward R. Johnson
The Haworth Press, 1988
Buku Teks
Danny P. Wallace; Connie Van Fleet, editor
Libraries Unlimited, Inc., 2001
Buku Teks
R.R. Bowker, 1969
Buku Referensi
Harig, Katherine J.
Library Professional , 1989
Buku Teks