Hong, Sun Wen
20 Segi hanguk soseul 27 : Hong Sung-won sinsangung
Chang bi, 2009
Buku Teks
20 Segi hanguk soseul 24: Usang eui, nun mul, abe eui gajok, ribbattong janggun, julmjurinhan
Chang bi, 2005
Buku Teks
Jo, Seon Jak
20 Segi hanguk soseul 29 : Seonsaenggwa hwangtaeja, america, jeongja-e, jeonseongsidae
Chang bi, 2009
Buku Teks
20 Segi hanguk sosol 22: Seung-se Cheon et Bang Young-ung
Chang bi, 2005
Buku Teks
20 segi hanguk soseul 28 : nanjunggiga ssoaollin jageun gong, mwebiuseueui jti, jangma, ahop kyeolleeui guduro nameun sanae
Chang bi, 2010
Buku Teks