Klippel, Friederike, author
Cambridge University Press , 1993
Buku Teks
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
Buku Teks
Christie, Francis
Oxford University Press, 1989
Buku Teks
Richards, Jack C., author
Cambridge University Press, 2006
Buku Teks
Richards, Jack C., author
Cambridge University Press, 1994
Buku Teks