Kim, Hye Suk
(Modorigatonanen) gugo hakkwa gugo gyohaeng : haeng sol
Wolin, 2009
 Buku Teks
Choi, Song Wu
Gugo-ui gosu.1-3
Communication Books, 2007
 Buku Referensi
Nam, Yong Sin, 1948-
4 Junganui gugo yohaeng : gugo yohaeng el machi myon gelssegika
Seongandang, 2010
 Buku Teks
Gugo Nophimbep phyohyon ui paldal 2
by Hong Jong Son ... [and others]
Doseo Chulphcn;Doseo Chulphcn, 2009
 Buku Teks
Lee, Jin-won
Uri mal e taehan yeui : kyo yol gijayi Jin won ui barun mal Iyagi
Seohaemunjib, 2006
 Buku Teks