Robinson, O.F.
The sources of roman law: problems and methods for ancient historians
Routledge, 1997
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Information technology and politics Margaret Colmer
Artikel Jurnal
Information sources in patents
edited by C.P. Ager
Bowker-Saur, 1992
Buku Referensi
Information sources in the medical sciences
editors, L.T. Morton, S. Godbolt
Butterworth, 1984
Buku Referensi
Wiggins, Gary, 1943-
Chemical information sources
McGraw-Hill, 1991
Buku Teks SO