Santayana, George, author
Scribner, 1951
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Field, G. Lowell, author
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Marsha Javierra, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Skripsi (Membership)
Rush, Michael, author
Harvester Wheatsheaf, 1992
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Laski, Harold J., author
George Allen and Unwin, 1948
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