Choe, Yong Bom, author
Peipo Rodu, 2008
Buku Teks
Harris, Richard, author
Hollym , 2005
Buku Teks
Gang U-bang, author
Sol , 2003
Buku Teks
Macdonald, Donald Stone
Westview Press, 1988
Buku Teks
Ju, Gang-hyeon, author
Hangyere Chulphan, 2010
Buku Teks