Jackson, John H.
West Publishing, 2013
Buku Teks
Fulmer, William E.
Richard D. Irwin, 1980
Buku Teks
Jones, Harry W.
The Foundation Press, 1980
Buku Teks
Steiner, Henry J.
The Foundation Press, 1968
Buku Teks
Jackson, John H.
St.Paul,Minn., 1995
Buku Teks