Korean Overseas Information Service
Hollym, 2003
Buku Teks
Kim, Yong-ran, author
Daekyo Chool Pan, 2002
Buku Teks
Vegdahl, Sonja, author
Marshall Cavendish, 2005
Buku Teks
Vegdahl, Sonja, author
Marshall Cavendish Editions, 2005
Buku Teks
Sin, Gyong-rim, author
Chang Juk Gwa Bi Pyeong Sa, 2000
Buku Teks