World press encyclopedia; Volume I
edited by George Thomas Kurian
Facts on File, 1982
 Buku Referensi
Encyclopedia of world cultures; Volume II
edited by Terence E. Hays
G.K. Hall, 1991
 Buku Referensi
The Columbia encyclopedia; Volume II
edited by William Bridgwater dan Seymour Kurtz
Columbia University Press, 1963
 Buku Referensi
The encyclopedia of democracy; Volume II
editor in chief, Seymour Martin Lipset
Routledge, 1995
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Encyclopedia of world cultures: volume IV
editor, Linda A. Bennett
New York G.K. Hall [and] Company 1991-1996
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