Shera, Jesse H.
Libraries Unlimited, 1976
Buku Teks
Williams, Malcolm, 1953-
Routledge, 2000
Buku Teks
Rubin, Richard E.
Neal-Schuman Publishers, Inc. , 1998
Buku Teks
edited by R.N. Chopra
Anmol Publications, 1992
Buku Referensi
edited by Allen Kent
Marcel Dekker, 1993
Buku Referensi