edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks
cambridge, 2006
Buku Teks
Roy Wood Sellars; V.J. McGill; Marvin Farber (editor)
Macmillan, 1949
Buku Teks
Bentley, John Edward
Littlefield, Adams, 1958
Buku Teks
Laird, John, 1954-
Oxford University Press, 1945
Buku Teks