Song, Gwang-su, author
Hanguk Munhwaswa, 2005
Buku Teks
Chaeryun, 2010
Buku Teks
Lee, Sang-oak, author
[Publisher not identified], [Date of publication not identified]
Buku Teks
Park, Y.T. Francis
Hollym International Corp, 1991
Buku Teks
Park, Naree, author
Hollym, 2007
Buku Teks