Healey, Joseph F., 1945-
Cengage Learning, 2015
Buku Teks
Healey, Joseph F., 1945-
Wadsworth, 1996
Buku Teks
Levin, Jack
Harper & Row, 1973
Buku Teks
Healey, Joseph F., 1945-
Wadsworth and Cengage Learning, 2012
Buku Teks
Weiss, Robert S.
N.Y. Wiley , 1968
Buku Teks