Yoo, Yang-seok, author
Myung Won Culture, 2007
Buku Teks
National Academy of the Korean Language, 2002
Buku Referensi
New Jersey Hollym International Corp 2005
Buku Teks
Lee, Kwang-kyu
Jimoondang, 2003
Buku Teks
edited by Sohn Ho-min
University of Hawaii, 2006
Buku Teks