Powell, Ronald R.
Libraries Unlimited, Inc., 2004
Buku Teks SO
Simpson, I.S.
Library Association, 1988
Buku Teks SO
Simpson, Tan S.
ITB Press, 1988
Buku Teks SO
Hafner, Arthur Wayne
American Library Association, 1989
Buku Teks SO
Fowler, Floyd J.
Sage, 2002
Buku Teks SO