Butler, Pierce, author
The Universty of Chicago Press, 1967
Buku Teks
Shera, Jesse H., author
Libraries Unlimited, 1976
Buku Teks
Williams, Malcolm, 1953-, author
Routledge, 2000
Buku Teks
Rubin, Richard E., author
Neal-Schuman Publishers, Inc. , 1998
Buku Teks
edited by R.N. Chopra
Anmol Publications, 1992
Buku Referensi