21-segi chidoja
Subtitle: saeroun sidae ŭi chinjŏnghan lidŏsip
By: Cho Mal-su pʻyŏnjŏ.
Edition: Che 1-pʻan
Publisher: Hanʼguk Kyŏngje Sinmunsa
Published: 1999
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 248
Subjects: Leadership
Other titles: Isibil segi chidoja