Hasbullah Kasim Bakry
Widjaya, 1970
Buku Teks
Council for Research in Values and Philosophie, 2004
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Anesaki, Masaharu
Charles E. Tuttle , 1975
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Durkheim, Emile
George Allen and Unwin, 1954
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Saramago, Jose
Caminho, 2005
Buku Teks