Vlastos, Gregory, author
Cambridge University Press , 1991
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Rachels, James, 1941-2003, author
McGraw-Hill, 1998
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Artikel Jurnal
edited by Samuel Gorovitz ... [et al.]
Prentice-Hall, 1976
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Khudzaifah Dimyati ...[and others]; editor, Imam Edy Ashari
Genta Publishing, 2018
Buku Teks