Zweigert, Konrad, author
Clarendon Press, 1998
Buku Teks
Westview Press , 1985
Buku Teks
Glendon, Mary Ann
ST. Paull Minn, 1999
Buku Teks
David, Rene, 1906-, author
Stevens & sons, 1985
Buku Teks
Saint-Laurent, George E., author
Mayfield, 2000
Buku Teks