edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
Bentley, John Edward
Littlefield, Adams, 1958
Buku Teks
Mayer, Frederick
American Book Company, 1950
Buku Teks
edited by John Cottingham
Blackwell, 2008
Buku Teks
Russel, Bertrand
Routledge, 1948
Buku Teks