Bühring-Uhle, Christian
Kluwer Law International, 2006
Buku Teks
McIlwrath, Michael
Wolters Kluwer, 2010
Buku Teks
Park, William W.
Oxford University Press, 2012
Buku Teks
Blackshaw, Ian Stewart.
Cambridge University Press, 2009
Buku Teks
Crowley, Thomas E., 1948-
John Wiley & Sons, 1994
Buku Teks