edited by Graham walton, Andrew Booth
Facet Publishing, 2004
Buku Teks
Routledge, 2000
eBooks
Rakich, Jonathon S., author
Health Professions Press, 1990
Buku Teks
edited by Allan McNaught
Chapman and Hall , 1991
Buku Teks
Reynolds, Amanda, author
Open universtity press , 2000
Buku Teks