Eggen, Jean Macchiaroli, author
Thomson/West, 2010
Buku Teks
Barron, Jerome A., author
West, 2009
Buku Teks
Bernhardt, Roger, author
West Publishing, 1993
Buku Teks
Davies, Jack, author
West Publishing, 1975
Buku Teks
Hamilton, Robert W., author
West Publishing, 1996
Buku Teks