edited by John Herman Randali, Justus Buchler
Barnes & Noble, 1950
Buku Teks
Chen, Liu-Fu, author
Philosophical Library, 1948
Buku Teks
Russell, Bertrand, 1872-1970, author
Routledge, 1996
Buku Teks SO
Scruton, Roger
Pantja SImpati , 1986
Buku Teks
Palmer, Donald, author
McGraw-Hill, 2001
Buku Teks