Gaa, Charles J.
McGraw-Hill , 1965
Buku Referensi
Andrews, William D., 1931-
Aspen Law & Business, 1973
Buku Teks SO
Andrews, William D., 1931-
Little, Brown, 1969
Buku Teks SO
Dodge, Joseph M., 1941-
Michie, 1995
Buku Teks SO
Bittker, Boris I.
Warren, Gorham and Lamont, 1980
Buku Teks SO