Jaffe, Frederick S.
McGraw-Hill, 1981
Buku Teks
Callahan, Daniel
Collier-Macmillan, 1970
Buku Teks
edited by Stuart Hampshire ... [et.al.]
Cambridge University Press, 1978
Buku Teks
edited by Wilhelm Danca
Council for Research in Values and Philosophy, 2008
Buku Teks SO
by Frank B. Feigert ... [et al.] ; edited by Don C. Piper and Ronald J. Terchek
American Enterprise Institute for Public Policy Research, 1983
Buku Teks