Davies, Tony
London Routledge 1997
Buku Teks
Downes, William
Cambridge University Press, 2011
eBooks
Hsu, Francis L.K., editor
Routledge & Kegan Paul Ltd , 1952.
Buku Teks
Mahood, M. M.
The Camelot Press, 1950
Buku Teks
Korean Overseas Information Service, 1978
Buku Teks