Gwynn, Stephen, author
Macmillan, 1950
Buku Teks
Jo, Dong-il, 1939-, author
Jisiksanupsa, 2010
Buku Teks
Mason, Germaine
Greenwood Press, 1964
Buku Teks
Reischauer, Edwin O., author
[publisher not identified], 1951
Buku Teks
edited by Susie Beattie and Rachel Smith
Harper and Collins, 2011
Buku Referensi