Kim, Pusik
Academy of Korean Studies Press, 2012
Buku Teks
Johnston, Grahame
Oxford University Press, 1970
Buku Teks
Buku Teks
New York : The American Council on the Teaching of Foreign Language Inc
Majalah, Jurnal, Buletin
Sage Publications, Inc, 2006
Majalah, Jurnal, Buletin