Corstius, Jan Brandt
Random House, 1968
Buku Teks
Zweigert, Konrad
North-Holland, 1977
Buku Teks
Wiarda, Howard J.
Thomson Wadsworth, 2000
Buku Teks
Klesner, Joseph L.
McGrawHill education, 2014
Buku Teks
Zweigert, Konrad
Clarendon Press, 1998
Buku Teks