Ahn, Kyung-hwa, author
Korea Foundation, 2010
Buku Teks
Oskarsson, Mats, author
Pergamon Press , 1980
Buku Teks
Ewer, J.R.
Longman, 1969
Buku Teks
Terry, Morgan, author
Pearson, 2007
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah