Holdcroft, David
Butterworth, 1991
Buku Teks
Davies, Howard
Butterworth, 1991
Buku Teks
Manning, Peter J.
Oxford University Press, 1990
Buku Teks
edited by Matthew Kieran
Blackwell, 2006
Buku Teks
Gyula Klima, Fritz Allhoff, Anand Vaidya
BlackWell Publishing, 2007
Buku Teks