Dictionary of philosophy
edited by Dagobert D. Runes
Littlefield, Adam & Co., 1963
 Buku Referensi
Lacey, A. R. (Alan Robert)
A dictionary of philosophy
Routledge, 1986
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Lacey, A. R. (Alan Robert)
A dictionary of philosophy
Routledge, 1996
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Mautner, Thomas
The Penguin dictionary of philosophy
Penguin Book, 2005
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Blackburn, Simon
The Oxford dictionary philosophy
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