International Cultural Society of Korea, 1983
Buku Teks SO
National Unification Board Republic of Korea, 1982
Buku Teks SO
National Unification Board Republik of Korea, 1988
Buku Teks SO
National Unification Board, 1988
Buku Teks SO
Ko, Un, 1933-
South Korea, 2006
Buku Teks