edited by Berys Gaut, Dominic McIver Lopes
Routledge, 2006
Buku Referensi
Steven M. Cahn, Aaron Meskin, editor
Blackwell Publishing, 2008
Buku Teks
Graham, Gordon
Routledge , 1997
Buku Teks
Sim, Stuart
Harvester Wheatsheaf, 1992
Buku Teks
Statkine Reprints, 1969
Buku Teks