Kim, Hye Suk, author
(Modorigatonanen) gugo hakkwa gugo gyohaeng : haeng sol
Wolin, 2009
 Buku Teks
Hong, Sa-man, author
Gugo hyongtae emie tamsek
Yoklak, 2009
 Buku Teks
Bae, Chang-hwan, author
Gugo sigane siilki.1
Vernacular, 2010
 Buku Teks
Choi, Song Wu, author
Gugo-ui gosu.1-3
Communication Books, 2007
 Buku Referensi
No, Dae Gyu, author
Gugo hak seaseol
Sinwonmunhwasa, 2008
 Buku Teks
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