Stone, Linton
Macmillan, 1970
Buku Teks
Swan, Michael
Cambridge University Press, 1987
Buku Teks
Sharpe, Pamela J.
Barron's, 2001
Buku Teks
French, F. G.
Oxford University Press, 1951
Buku Teks
The Language Research Institute of Seoul National University; written by Lee Sang-oak Lee [and others]
Hollym, 1999
Buku Teks