Myongdo Language Institute, [date of publication not identified]
Buku Teks
Vandesande, Anthony V., author
Myongdo Institute, 1967
Buku Teks
Halliday, David, 1916-2010, author
John Wiley & Sons, 1962
Buku Teks
Meriam, J. L. (James L.), author
John Wiley & Sons, 1959
Buku Teks
Yale University Press, 1992
Buku Teks