Lee, Chae-song, 1965-
Gul ssugi rul wihan 4-cheotnman ui kugo cheaek
Tullyok, 2006
Buku Teks
Jong, Gil-nam, 1943-
Kugo pyon yongu = language expression studies
Hankaakmunhwasa, 2006
Buku Teks
Ono pomju wa yuhyong : iron kwa ungyong
Kim Ki-hyok, translator
Sotong, 2008
Buku Teks
Im, Chi Ryong
Kugo uimiron
Tap Chulpansa, 1992
Buku Teks
Yun, Pyong Hyon, 1950-
Kugo uimiron
Yongnak, 2008
Buku Teks