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
Shealy, C. Norman, author
Element, 1998
Buku Referensi