Cabot, Meg
Harper Collins, 2001
Buku Teks SO
Wint, Guy
Penguin Books, 1955
Buku Teks SO
Hemmert, Martin
New York : Routledge, 2012
Buku Teks
Korean Culture and Information Service Ministry of Culture, Sports and Tourism, 2009
Buku Referensi
Cho, Dong Il
Jimoondang, 2006
Buku Teks SO