Van Loon, Hendrik William, author
New York Poeket Books tth,
Buku Teks
Lee, Ki-baik, author
Soul lechokok, 1984
Buku Teks
by Carter J. Eckert ... [et.al.]
Korea Institute, Harvard University, 1990
Buku Teks
Lee, Hyun-hee, author
Seoul Jimoondang 2005
Buku Teks
Crow, Carl
Tudorr Publishing, 1937
Buku Teks