Prentice-Hall, [date of publication not identified]
Buku Teks
Appleton-Century-Crofts, 1967
Buku Teks
Cox, William E. Jr.
N.Y. John Wiley c., 1979
Buku Teks
Haeoe Hongbowon
Korean Culture and Information Service, 2011
Buku Teks
Harris, Ben M.
Prentice Hall Inc., 1975
Buku Teks