Korean Overseas Information Service, [date of publication not identified]
Buku Teks
Yekyong Publications, 1987
Buku Teks
Lee, Kyong-hee
The Korea Herald , 1993
Buku Referensi
Lee, Kyong-hee
Korea Herald , 1994
Buku Teks
The Korean Foundation, 1996
Buku Referensi