Barron, Jerome A., author
West, 2009
Buku Teks
Guruswamy, Lakshman D., author
Thomson/West, 2012
Buku Teks
Hamilton, Robert W., author
West Publishing, 1996
Buku Teks
Findley, Roger W., author
West Publishing, 1992
Buku Teks
Gellhorn, Ernest, author
West , 1994
Buku Teks