Korean Culture and Information Service, 2008
Buku Teks
Pelayanan Kebudayaan dan Informasi, 2008
Buku Teks
Korea Korean Overseas Information Service
Office for Government Policy Coordination, 2006
Buku Teks
John, Yun, author
Hongikmedia, 2007
Buku Referensi
Yun, Jo
Hongik Media, 2007
Buku Teks