Weis, P.
Sijthoff and Noordhoff, 1979
Buku Teks
Martinus Nijhoff , 1990
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Fenwick, Charles G., author
Appleton-Century-Crofts, 1948
Buku Teks
Shaw, Malcolm N. (Malcolm Nathan), 1947-, author
Cambridge, 2003
Buku Teks