Cho, Hae-il, author
Dong-su-Munhak-sa, 1990
Buku Teks
Reischauer, Edwin O., author
Stanford University Press, 1953
Buku Teks
edited by Guy Neave, Frans A van Vught
Pergamon Press, 1994
Buku Teks
Dooley, Thomas A.
Farrar, Straus and Company, 1958
Buku Teks
Hutchison, Bruce, author
Longmans Green, 1957
Buku Teks