Pannett, A.J.
Pitman, 1992
Buku Teks
Prosser, William L., author
West Publishing, 1971
Buku Teks
Keeton, Page, author
West Pub., 1971
Buku Teks
Holmes, Oliver Wendell, Jr.
Little, Brown and Company, 1951
Buku Teks
Markesinis, B.S., author
Clarendon Press, 1990
Buku Teks