Gillmor, Donald M.
West Publishing Company, 1974
Buku Teks
Nelson, Harold L.
The Foundation Press,Inc., 1978
Buku Teks
Corman, Calvin W., author
Little, Brown, 1983
Buku Teks
Kauper, Paul G., author
Little, Brown, 1971
Buku Teks
Barrett, Edward L., author
Foundation Press, 1977
Buku Teks