Midgley, James, author
Sage Publications, 1997
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Paulo Da Silva Pinto, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
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Trattner, Walter I., author
Free Press, 1984
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Garton, Stephen
Allen & Unwin, 1990
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Trattner, Walter I., author
Free Press, 1979
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