Chastain, Kenneth
Rand McNally , 1971
Buku Teks
Ur, Penny, author
Cambridge University Press, 1991
Buku Teks
Rivers, Wilga M., author
Cambridge University Press, 1994
Buku Teks
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
Buku Teks
Richards, Jack C., author
Cambridge University Press, 1994
Buku Teks