Michael G. Grantham, editor
Routledge, 2011
Buku Teks
Wegmann, T., author
Editiones Roche, 1987
Buku Teks
Church, James C., author
McGraw-Hill, 1979
Buku Referensi
Condliffe, Peter, author
Lexis lexis, 2012
Buku Teks
Dutson, Stuart, author
Global Law and Business, 2012
Buku Teks