Stevenson, Deborah
Open University Press, 2003
Buku Teks
Tonkiss, Fran
Polity Press, 2013
Buku Teks
Schwab, William A.
Prentice-Hall, 1992
Buku Teks
edited by Andrew Blowers, Chris Hammett and Philip Sarre
Hutchinson Educational in association with the Open University Press, 1974
Buku Teks
Gutkind, E. A.
The Free Press of Glencoe, 1963
Buku Teks