Klager, Roland
Cambridge University Press, 2011
Buku Teks
Schil, Stephen W.
Cambridge University Press, 2013
Buku Teks
Cambridge University Press, 2014
Buku Teks
edited by Peter Muchlinski, Federico Ortino and Christoph Schreuer
Oxford University Press, 2008
Buku Teks
Michael Waibel
Wolters Kluwer, 2010
Buku Teks