Rivers, Wilga M., author
Cambridge University Press, 1994
Buku Teks
Ur, Penny, author
Cambridge University Press, 1991
Buku Teks
Stevick, Earl W.
Cambridge Cambridge University Press 1991,
Buku Teks
Stevick, Earl W.
Cambridge University Press, 1982
Buku Teks
Halliday, M.A.K., author
Longman, 1966
Buku Teks