O, In-tʻak.

• Hanʼguk hyŏndae kyoyuk chʻŏrhak kwa kyoyuk sahak ŭi chŏnʼgae
• Hanʼguk Kidokkyo kyoyukhak munhŏn mongnok, 1945-1980
• Hanʼguk Kidokkyo kyoyukhak munhŏn mongnok, 1945-2005
• Kyohoe kyosa kyoyuk ŭi hyŏnsil kwa panghyang