Chowdhury, Indira, author
Oxford University Press, 2016
eBooks
Chiyoda-ku, Tokyo JSBRI 1992,
Buku Teks
Harris, Myra A., author
Prentice-Hall, 1997
Buku Teks
Leiden University, [date of publication not identified]
Buku Teks
Bustani, Henry, author
Gramedia, 2005
Buku Teks