BTS nŭn ŏttŏk'e 21-segi ŭi Pit'ŭlsŭ ka toeŏnna
Subtitle: changnŭ rŭl mandŭnŭn p'aendŏm ŭi modŭn kŏt
Publisher: Puk Resip'i
Published: 2021
Place of publication: Sŏul
Language: kor
ISBN-13: 9791190489362