De Fina, Anna, author
[Cambridge University Press;, ], 2012
eBooks
Ager, D. E., author
Cambridge University Press, 1990
Buku Teks
Lombard, Denys, author
SECMI, 1977
Buku Teks
edited by Raymond Cochrane and Douglas Carrol
Falmer Press, 1991
Buku Teks
edited by Lawrence S. Wringtsman
Wadsworth, 1968
Buku Teks