Reid, D. A. G.
London: Longman, 1966
Buku Teks
Kang, Chong-hun 강종훈, author
Ungjin Chisik Haus, 2011
Buku Teks
Kang, Man-Gil
Folkestone Global Oriental 2006
Buku Teks
Oberdofer, Don, author
Korea Basic Books, 2001
Buku Teks
Lee, Ki-baik, author
Soul lechokok, 1984
Buku Teks