edited by John R. Bowen and Roger Petersen
Cambridge University Press, 1999
Buku Teks SO
Jean-Francois Bellis, Porter Ellioty, Van Bael, editor
Thomson Reuters, 2011
Buku Teks
Andrew Horrocks, Clyde & Co LLP, editor
Thomson Reuters, 2011
Buku Teks
Jakarta : The Ambassador of The Republic of Zimbabwe, 2007,
Majalah, Jurnal, Buletin
Estell, Kenneth
Visible Ink Press, 1994
Buku Teks