Asia, Tʻaepʻyŏngyang chiyŏk ŭi hwanʾgyŏng munje, hwanʾgyŏng undong mit hwanʾgyŏng chŏngchʻaekChong-hoe Yang · First published 2002Open the Tome
Hanʼguk ŭi simin sahoe wa sin sahoe undongHŭi-sŏp Im, Chong-hoe Yang · First published 1998Open the Tome
Palchŏn kwa chŏ palchŏn ŭi pigyo sahoehakChong-hoe Yang, Su-hun Yi, Sŏk-chʻun Yu · First published 1993Open the Tome