Charlton Smith, Nick, author
[RIBA , ], 2007
eBooks
Duerden, C.
Philosophical Library, 1970
Buku Teks
Bentham, Jeremy
Prometheus Books, 1988
Buku Teks
Twomey, David P.
South-Western Pub, 1985
Buku Teks
edited by Nigel G. Foster
Blackstone Press Limited, 1990
Buku Referensi