Choi, Won-Oh
Global Oriental, 2008
Buku Teks
Tae-Hung, Ha
Yonsei University Press, 1968
Buku Teks
Korea Foundation
Cookand/Besthome, 2003
Buku Teks
Korean Overseas Information Service
Hollym, 2003
Buku Teks
Ha, Tae Hung
Yonsei University Press, 2002
Buku Teks