Hartley, R.J.
Online searching: principles and practice
Bowker-Saur, 1990
 Buku Teks SO
Chowdhury, G.G.
Searching CD-ROM and online information sources
Library Association, 2001
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Online searching in science and technology: an introductory guide to equipment, databases and search techniques
written by the Staff of the Science and Technology Information Service
British Library , 1991
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Ellis, David
Progress and problems in information retrieval
Library Association Publishing, 1996
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Bell, Suzanne S.
Librarian's guide to online searching: cultivating database skills for research and instruction
Libraries Unlimited, 2015
 Buku Teks SO