Martin, David, author
Rigby, 1981
Buku Teks
Lee, Son-i, 1967-, author
Hanguk moon hwasa, 2007
Buku Referensi
Lee, Jong-hee, author
Hawoo, 2010
Buku Referensi
by Lee Sam Hyong ... [and others]
Joongang kyoyook jin heung yeongooso, 2003
Buku Teks
Kim, Hyong Chol, 1950-, author
Daehakyo Chulphanbu, 2009
Buku Referensi