Stace, W. T.
Dover Publications, Inc., 1923
Buku Teks
Gilson, Etienne
Librairie Philosophique, 1932
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Cairns, Huntington, 1904-1985, author
Johns Hopkins Press, 1967
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Cairns, Huntington, author
The John Hopkins Press, 1949
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Kegley, Charles W. (Charles William), Jr., author
St. Martin's Press, 1995
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