Yu, Yon-thae
Naenara suwil thoyo haeng : 3040 el wihan yohaeng ui hyanggi
Book I, 2007
Buku Referensi
Kim, Hye Suk
(Modorigatonanen) gugo hakkwa gugo gyohaeng : haeng sol
Wolin, 2009
Buku Teks
No, Dae Gyu
Gugo hak seaseol
Sinwonmunhwasa, 2008
Buku Teks
Hong, Sa-man
Gugo hyongtae emie tamsek
Yoklak, 2009
Buku Teks
Bae, Chang-hwan
Gugo sigane siilki.1
Vernacular, 2010
Buku Teks