Frellesvig, Bjark, author
Cambridge University Press, 2010
Buku Teks
Susumo, Ohno, author
Kokusai Bunka Shinkoka, 1970
Buku Teks
Lawson, Bryan, author
Architectural press, 2003
Buku Teks
Alfonso, Anthony, author
Sophia University LL Center of Applied Linguistics, 1980
Buku Teks
Tokyo : Kenkyusha, [date of publication not identified]
Buku Referensi