Do, Ho-yon, author
M & K, 2007
Buku Referensi
written by Koean Cultural and Historical Survey Society ; translated by Jung Ha Yun
Korean, Dolbegae Publishers, 2007
Buku Referensi
Koehler, Robert, author
Seoul Selection, 2009
Buku Teks SO
Ho, Pyong-sik, author
Touchart, 2009
Buku Teks
Choi, Jun-sik, author
Dong Asia, 2006
Buku Teks