Mok, Chong-so, author
Hanguko munpomnon : piyoron chok kwanchom eso pon chosa wa omi ui hyongtae tongsaron
Teukpyolsi : Worin, 2003
 Buku Teks
Kim, Tae Gon, author
Gugo ohwi ui thongsijok yongu
Bogjong, 2008
 Buku Teks
Choi, Song Wu, author
Gugo-ui gosu.1-3
Communication Books, 2007
 Buku Referensi
Gugo Nophimbep phyohyon ui paldal 2
by Hong Jong Son ... [and others]
Doseo Chulphcn;Doseo Chulphcn, 2009
 Buku Teks
Pak, Dong-gun, 1966-, author
Hangugo hyong thaeron yongu ui saeroun monsaek
Sontong, 2008
 Buku Teks
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