edited by Korean National Commission for UNESCO
Hollym, 2003
Buku Referensi
edited by Chung Chong-wha
Kegan Paul International, 19889
Buku Teks
Korean Overseas Information Service
Hollym, 2003
Buku Teks
Barger, V. (Vernon), 1938-, author
McGraw-Hill, 1973
Buku Teks
Meyer-Arendt, Jurgen R., author
Prentice-Hall, 1989
Buku Teks