edited by Tim O`Riordan and Jill Jager
Routledge, 1996
Buku Teks
Giddens, Anthony, author
Polity , 2009
Buku Teks
Dash, S.K., author
Cambridge University Press, 2007
Buku Teks
edited by Stephen White, Judy Batt and Paul G. Lewiss
Macmillan, 1993
Buku Teks
Nugent, Neill, author
Macmillan, 1994
Buku Teks