National Unification Board Republik of Korea, 1988
Buku Teks
International Cultural Society of Korea, 1983
Buku Teks
National Unification Board Republic of Korea, 1982
Buku Teks
Korea Institute for National Unification, 2014
Buku Teks
Srivastava, Mahavir Prasad, 1941-, author
Prentice Hall of India Private , 1982
Buku Teks