Hyeon, Jin-geon, author
Sapiens 21, 2012
Buku Teks
Lee, Jeong Il, author
[publisher not identified], [date of publication not identified]
Buku Teks
An, Kyong-hwa, author
Han'guk Munhwasa, 2007
Buku Teks
Kim, Chin-ho, 1968-, author
Pagijong, 2006
Buku Teks
Sin, Chu-chol, author
Komyunikeisyon Buksu , 2006
Buku Teks