Oudot, Simone
Jakarta : Binarupa Aksara, 1991
Buku Referensi
Ashworth, Allan
Longman, 2001
Buku Teks
Greenstreet, Bob
Rud Educational and Professional Publishing, 1996
Buku Teks
Burr, Andrew
Informa Law from Routledge, 2017
Buku Teks
Collier, Keith, 1927-
Delmar, 1994
Buku Teks