McCloskey, Robert G., author
Harvard University Press, 1973
Buku Teks
McCloskey, Robert G., author
The University of Chicago Press, 1962
Buku Teks
Walker, Mary M.
General Learning Press, 1974
Buku Teks
Rehnquist, William H
Morrow, 1987
Buku Teks
Cox, Archibald, 1912-2004, author
Houghton Mifflin, 1987
Buku Teks