Cook, Guy W.D.
Oxford University Press, 2000
Buku Teks
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
Buku Teks
Cook, Vivian
ARNOLD, 2001
Buku Teks
Fairclough, Norman
Rotledge, 2010
Buku Teks
Mitchell, Rosamond
Arnold, 1998
Buku Teks