Han'gugŏ kyosa ka kkok araya hal Han'gugŏ parŭm kyoyuk ui iron kwa silcheChi-yŏng Sin, Hyang-sil Chang, Hye-jin Chang, Chi-yŏn Pak · First published 2015Open the Tome
Kŭ yŏnghwa kach'i pollaeyo?Yŏng-jin Kim, In-yŏng Nam, Chi-hye Sin, In-ch'ŏl Cho · First published 2013Open the Tome