Palais Des Nations, 1993
Buku Referensi
Mauger, G., author
Librairie, 1955
Buku Teks
Saussure, Ferdinand de, author
Boulevard Saint Germain , 1949
Buku Teks
Anzilotti, Dionisio, author
Recueil Sirey, 1929
Buku Teks
Lasserre, E., author
Lausanne Librairie Payot 1959
Buku Teks