Hurley, Patrick J., 1883-1963
Wadsworth and Cengage Learning, 2012
Buku Teks
Hurley, Patrick J., 1883-1963
Wadsworth, 1984
Buku Teks
Copi, Irving M.
Macmillan, 1961
Buku Teks
Boolos, George
Harvard University Press, 1998
Buku Teks
Copi, Irving M.
Macmillan, 1972
Buku Teks