Brady, Robert A.
University of California Press, 1950
Buku Teks
Joseph Harry Krisnamurti, author
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Artikel Jurnal
Aumann, Francis R.
Thomas Y. Crowell Company, 1956
Buku Teks
Information , 1983
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Muh Kadarisman, author
Faculty of Social and Political Sciences, Universitas Muhammadiyah Jakarta, 2012
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