Methopld, Ken
Compass Publishing, [date of publication not identified]
Buku Teks
Seoul-Somerset Jimoondang Publishing 2000
Buku Teks
photographed and edited by H. Edward Kim
Hyung Mun, 1981
Buku Teks
Ha, Tae Hung, author
Yonsei University Press, 1984
Buku Teks
Lee, Kwang-kyu
Jimoondang, 2003
Buku Teks