Chŏng-yun Chʻoe

• Hanʼguk taehak ŭi chilchŏk sujun punsŏk yŏnʼgu
• Hanʼguk taehak ŭi chilchŏk sujun yŏnʼgu
• OECD kodŭng kyoyuk haksŭp sŏngkwa pʻyŏngka saŏp chʻamyŏ rŭl wihan kichʻo yŏnʼgu