Information sources in politics and political science : a survey worldwide
editors, Dermot Englefield, Gavin Drewry
Butterworth, 1984
 Buku Referensi
Prytherch, Ray
Sources of information in librarianship and information science
Gower, 1987
 Buku Referensi
Parker, Christopher Charles
Information sources in science and technology : a practical guide to traditional and online use
Butterworths, 1960
 Buku Teks
Huszar, George B. de (George Bernard), 1919-1968
Political science
Littlefield, Adams, 1959
 Buku Teks
Wiggins, Gary, 1943-
Chemical information sources
McGraw-Hill, 1991
 Buku Teks