Ehrmann, Henry W., author
Prentice-Hall, 1976
Buku Teks
Zweigert, Konrad, author
North-Holland, 1977
Buku Teks
Cruz, Peter de
Kluwer, 1993
Buku Teks
David, Rene, 1906-, author
Stevens & sons, 1985
Buku Teks
Grossfeld, Bernhard
Clarendon Press , 1990
Buku Teks