Renwick, Alan.
Stanley Thornes Publishing, 1993
Buku Teks
edited by David Ingram
Blackwell , 2002
Buku Teks
Tansey, Stephen D., author
Routledge, 1996
Buku Teks
Moten, Abdul Rashid, author
Thomson, 2006
Buku Teks
Roskin, Michael G., 1939-, author
Pearson, 2017
Buku Teks