Chattopadhyay, P., author
McGraw-Hill, 2001
Buku Teks
Yorston, Robert Keith, Sir., author
Law Book Company, 1966
Buku Teks
Hollins, Carole, author
Blackwell Munksgaard, 2006
Buku Teks
La Londe, William S.
New York: McGraw-Hill, 1991
Buku Teks
Cambridge University
Cambridge university press, 2000
Buku Teks