Lee, Kyong-hee, author
The Korea Herald , 1993
Buku Referensi
Lee, Kyong-hee, author
Korea Herald , 1994
Buku Teks
Allen, Horace Newton, author
G.P. Putnam's Sons, 1889
Buku Teks
Metford, J.C.J., author
Thames and Hudson, 1983
Buku Referensi
Buku Teks