Weatherill, Lorna
Routledge, 1996
Buku Teks
Cherry, Deborah
Routledge, 2000
Buku Teks
edited by Kevin Gilmartin
Cambridge University Press, 2017
Buku Teks
Massey, Anne
Manchester University , 1995
Buku Teks
Golinski, Jan
Cambridge University Press , 1992
Buku Teks