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