Takeshi, Nakagawa, author
International House of Japan, 2005
Buku Teks
Takeshi, Nakagawa, author
The International House of Japan, 2005
Buku Referensi
Carver, Norman F., author
Shokokusha, 1955
Buku Teks
Howard, Darlene V., author
Macmillan, 1983
Buku Teks
Takada, Noriko, author
Macmillan, 1995
Buku Teks