Kim, Hyong Chol, 1950-
Guko ohwi yongu
Daehakyo Chulphanbu, 2009
 Buku Referensi
Choi, Song Wu
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
Han, Gil
Hyondae uri mal-ui toep uripop yongu
Youkrack, 2009
 Buku Teks
Pak, Dong-gun, 1966-
Hangugo hyong thaeron yongu ui saeroun monsaek
Sontong, 2008
 Buku Teks