Jaffe, Frederick S., author
McGraw-Hill, 1981
Buku Teks
Jaffe, Frederick S., author
McGraw-Hill, 1981
Buku Teks
Callahan, Daniel
Collier-Macmillan Ltd., 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