edited by Linda Rae Bennett and Sharyn Graham Davies
Routledge, 2015
Buku Teks
Richard Phillips, Diane Watt, David Shuttleton
Roultedge, 2000
Buku Teks
edited by Gavin Brown, Kath Browne
Routledge, 2016
Buku Teks
Stokes, Windy, author
Poloty Press, 2005
Buku Teks
Wang, James C.F., author
Prentice-Hall, 1985
Buku Teks