20 Segi hanguk soseol 20: Su Jung Lin, Park Tae Sun
Chang bi, 2005
Buku Teks
20 Segi hanguk soseol 30: Choi In Ho, Park Bom Shin
Chang BI, 2005
Buku Teks
Lee, Sang
20 Segi hanguk soseol 9
Chang BI, 2005
Buku Teks
20 Segi hanguk soseol 4
Choe Won-sik ... [and others]
Changbi, 2009
Buku Teks
20 Segi hanguk soseol 5
Choe Won-sik, Kim Yoo Jung, Chae Man Shik
Changbi, 2009
Buku Teks