Robert, Collins, author
Harper Collins, 1995
Buku Referensi
Scotland, 1999
Buku Referensi
Lambert, Rene, author
Ce?padues-Editions, 1991
Buku Referensi
Girard, Denis
Cassell , 1981
Buku Referensi
editor, Gunter Neubert
Pergamon Press, 1973
Buku Referensi