edited by Elaine Treharne ... [etal]
Humanities Press, 1992
Buku Teks
Swets & Zeitlinger B.V., 1994
Majalah, Jurnal, Buletin
Wiley-Blackwell, 2013
Buku Teks
Edinburgh University Press, 2005
Buku Teks
Allen, Widdowson, author
[publisher not identified], [date of publication not identified]
Buku Teks