Keylor, William R., 1944-
Oxford University Press, 1996
Buku Teks
edited by Chang Yun-Shik and Steven Hugh Lee
Routledge, 2006
Buku Teks
Namho, Lee, author
East Bridge, 2005
Buku Teks
Boveri, Margret
G. P. Putnam's Son, 1963
Buku Teks
Ward, A.C.
The English Language Book, 1928
Buku Teks