Meras, Edmond A.
Harper & Row, 1962
Buku Teks
Stevick, Earl W.
Abingdon, 1967
Buku Teks
Cook, Vivian, author
ARNOLD, 2001
Buku Teks
edited by Michael McCarthy
Cambridge University Press, 2016
Buku Teks
edited by Michael Byram
Routledge, 2000 ; 2004
Buku Referensi