Cambridge University Press, 2004
Buku Teks
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
Fairclough, Norman, author
Rotledge, 2010
Buku Teks