Cuba, George S.
Standard catalog of world paper money : modern issues, 1961-present
Krause, 2008
 Multimedia
Standard catalog of world coins: 1601-1700
George S. Cuhaj, editor
Krause, 2011
 Buku Referensi
Rodrigues, Dawn
The research paper and the world wide web
Prentice-Hall, 2000
 Buku Teks SO
Dilemmas of world politics: international issues in a changing world
edited by John Baylis and N.J. Rengger
Clarendon Press , 1992
 Buku Teks SO
Languages of the world : cataloging issues and problems
edited by Martin D. Joachim
The Haworth Press, 1993
 Buku Teks SO