Manger, Jason J., author
McGraw-Hill, 1995
Buku Referensi
Paul L.C. Torremans, editor
Kluwer Law International, 2008
Buku Teks
North-South Institute , 1993
Buku Teks
Smith, Rhona K., author
Routledge, 2010
Buku Teks
Carliner, David
Avon Books, 1977
Buku Teks