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