edited by Bernhard Kettemann and Robert N. St. Clair
Gunter Narr Verlag Tubingen, 1980
Buku Teks
Wallace, Michael J.
Cambridge University Press, 2004
Buku Teks
Dubin, Fraida
Cambridge University Press, 1986
Buku Teks
edited by John A.S Read edited by
Singapore University Press for SEAMEO Regional Language Centre, 1984
Buku Teks
Tsui, Amy B. M.
Cambridge University Press, 2003
Buku Teks