Rose, Michael D.
Westburg Asso Pub, 1988
Buku Teks SO
Hudson, David M.
St. Paul, Minn, 1994
Buku Teks SO
Andrews, William D., 1931-
Little, Brown, 1979
Buku Teks SO
Chommie, John C.
West Publishing, 1968
Buku Teks SO
Stephan, Paul B.
Emmanuel Law Outlines, 1994
Buku Teks SO