Jahn, Egbert
World Political Challenges
Springer-Verlag, 2015
 eBooks
Cristalis, Irena
East Timor : a nation's bitter dawn
Palgrave Macmillan , 2009
 Buku Teks
Bouvier, Leon F.
World population : challenges for the 21st century
Seven Lucks Press, 1999
 Buku Teks
Flint, Colin
Political geography : world-economy, nation-state and locality
Pearson/Prentice Hall, 2007
 Buku Teks
Flint, Colin
Political geography : world-economy, nation-state, and locality
Taylor and Francis Group, 2018
 Buku Teks