McClure, William, author
Cambridge University Press, 2000
Buku Teks
Miho, Choo, 1959-, author
Cambridge University Press, 2008
Buku Teks
Batchelor, R. E.
Buku Teks
Evans, Bergen, 1904-, author
Random House, 1957
Buku Referensi
Kawakita, Michiaki, author
Kodansha International , 1968
Buku Referensi