Ott, J. Steven
Wadsworth and Cengage Learning, 2011
Buku Teks
Harper & Row , 1981
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Syarif Hidayahtullah
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2005
UI - Tesis (Membership)
edited by J.M. Gvishiani
Pergamon Press, 1984
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Tranquillo, Joe
Springer Nature, 2019
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