Bouvier, Leon F.
World population : challenges for the 21st century
Seven Lucks Press, 1999
Buku Teks
Tanaka, Akihiko
The new Middle Ages: the world system in the 21st Century
International House of Japan, 2002
Buku Teks
Castells, Manuel
Technopoles of the world : the making of 21st century industrial complexes
Routledge, 1994
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Mayall, James B. L.
Towards the new horizon : world order in the 21st century
Standard Publishers, 2009
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Entering the 21st century: world development report 1999/2000
Oxford , 2000
Buku Teks