Cambridge University Press, 2015
Buku Teks
Danuta Gabrys-Barker
Springer, 2012
eBooks
Cook, Guy (Guy W. D.), author
Oxford University Press, 2000
Buku Teks
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
Buku Teks
Cook, Vivian, author
ARNOLD, 2001
Buku Teks