Choi, Song Wu
Gugo-ui gosu.1-3
Communication Books, 2007
Buku Referensi
Kim, Hye Suk
(Modorigatonanen) gugo hakkwa gugo gyohaeng : haeng sol
Wolin, 2009
Buku Teks
Nam, Yong Sin, 1948-
4 Junganui gugo yohaeng : gugo yohaeng el machi myon gelssegika
Seongandang, 2010
Buku Teks
Jaemiitneun hangugeo workbook 2 : CD 2
Kyobo Book Centre, 2010-2011
Multimedia
Jaemiitneun hangugeo workbook 2 : CD 2
Kyobo Book Centre, 2010-2011
Multimedia