Soyearn, Yoo., author
Leescom, 2009
Buku Referensi
Christian Literature Society of Korea,, 1977
Buku Teks
The National Institue of the Korean Language, 2014
Buku Teks
Chang, Sun-yong, author
Ewha Womans University Press, 2006
Buku Teks
Yekyong Publications, 1987
Buku Teks