MacGillivary, Evan James
The Law Book Company, 1975
Buku Teks
Academy Editions, 1993
Buku Teks
Maxwell, Robert, author
Birkhauser Verlag, 1998
Buku Teks
Anderson, Hugh, author
Twayne Publishers, 1968
Buku Teks
Trieschmann, James S.
South - Western college Publishing, 1995
Buku Teks