Harris, Cyril M., author
W.W. Norton, 1998
Buku Referensi
Kodansha, 1993
Buku Referensi
Norwich, John Julius, editor
Oxford University Press, 1990
Buku Referensi
edited by Dennis Sharp
Quarto Publishing, 1991
Buku Referensi
Larousse , 1972
Buku Referensi