Jo, Seon Jak, author
20 Segi hanguk soseul 29 : Seonsaenggwa hwangtaeja, america, jeongja-e, jeonseongsidae
Chang bi, 2009
 Buku Teks
20 segi hanguk soseul 30 : itokiwa jamsuham, thain-e bang, gulhukgwa cheonjang, than-e eolgul
Chang bi, 2007
 Buku Teks
20 Segi hanguk soseul 31: Adumeui hun, mimany, malhaneun dol, dasiwol murieso, areum daun golgol
Changbi, 2005
 Buku Teks
20 Segi hanguk soseul 32: Cheong sandaek, haegu, nunim-eui chosang, mokseon
Changbi, 2005
 Buku Teks
20 Segi hanguk soseul 38 : Gamyeon, angae neo meo cheong jinhan2, ...
Lee Gyeong Ja, Yu Shi Chun, Kang Seok Kyeong
Changbi, 2008
 Buku Teks
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