Tsui, Amy B. M., author
Cambridge University Press, 2003
Buku Teks
edited by John A.S Read edited by
Singapore University Press for SEAMEO Regional Language Centre, 1984
Buku Teks
Cambridge University Press, 1990
Buku Teks
Richards, Jack C., author
Cambridge University Press, 2015
Buku Teks
edited by Bernhard Kettemann and Robert N. St. Clair
Gunter Narr Verlag Tubingen, 1980
Buku Teks