OOnŭl ŭi sŏnʼgyoronOnŭl ŭi sŏnʼgyoronde Keun Won ParkMateriasMissionsTheoryEdiciones (1)Onŭl ŭi sŏnʼgyoron (1983)Chŏnmangsa · korMás obras de Keun Won ParkCChŏnhwanʼgi ŭi sŏnʼgyo kyoyukChŏnhwanʼgi ŭi sŏnʼgyo kyoyukSSan ang ye sik sŏSan ang ye sik sŏŬŬi mang ye sik sŏŬi mang ye sik sŏ