Zuylen, Baron Pierre van
Paris Desclee de Brouwer 1950
Buku Teks
Huber, Gerard
Peter Lang , 1982
Buku Teks
Thiry, Marcel
Paris Librairie Hachette 1947
Buku Teks
Carles, Jules
Paris Presses Universitaires de Franch 1959
Buku Teks
Valode, Philippe, author
Editions De Vecchi, 2005
Buku Referensi