edited by Richard Boyd, Philip Gasper, and J. D. Trout
Bradford Book, 1997
Buku Teks SO
Whitehead, Alfred North, 1861-1947
Philosophical Library, 1948
Buku Teks SO
edited by Walter Gratzer
W.H.Freeman and Company, 1999
Buku Referensi
Bortolotti, Lisa
Polity Press, 2008
Buku Teks SO
Natanson, Maurice
Random House, 1963
Buku Teks SO