Adams, Edward B.
Seoul International Tourist Publishing, 1980
Buku Teks
Yang, Jongsung, author
Jimoondang International, 2003
Buku Teks
Pantheon Books Inc. , 1947
Buku Referensi
Smithsonian Instution Press, 1985
Buku Teks
Le Coq von, Albert
George Allen and Unwin , 1928
Buku Teks