Steiner, Henry J., author
The Foundation Press, 1968
Buku Teks
Jackson, John H., author
West Publishing, 2013
Buku Teks
edited by Marylin J. Raisch
Oceana, 1995
Buku Teks
Barlett, Cristopher A.
Irwin/McGraw-Hill, 2004
Buku Teks
Jones, Harry W., author
The Foundation Press, 1980
Buku Teks