Treasury of world philosophy
edited by Dagobert D. Runes
Littlefield, Adams & Co., 1959
 Buku Referensi
Christensen, Kit R.
Philosophy and choice : selected readings from around the world
McGraw-Hill, 2002
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Iannone, A. Pablo
Dictionary of world philosophy
Routledge, 2001
 Buku Referensi
The world's great thinkers: Man and Spirit; the speculative philosophers
ed. by Saxe Commins & Robert N. Linscott.
Random House , 1947
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Readings in philosophy
edited by John Herman Randali, Justus Buchler
Barnes & Noble, 1950
 Buku Teks