Hartley, R.J.
Online searching: principles and practice
Bowker-Saur, 1990
 Buku Teks SO
Tenopir, Carol
Issues in online database searching
Libraries Unlimited, 1989
 Buku Teks SO
Meadow, Charles T.
Basics of online searching
John Wiley & Sons, 1981
 Buku Teks SO
Zoller, Elisabeth
Introduction to public law: a comparative study
Martinus Nijhoff, 2008
 Buku Teks SO
Chowdhury, G.G.
Searching CD-ROM and online information sources
Library Association, 2001
 Buku Teks SO