Michael Beveridge, editor
Routledge, 2001
Buku Teks
edited by Michael Shayer
Open University Press, 2002
Buku Teks
Burke, Kay, author
Hawker Brownlow Education, 1999
Buku Teks
Nagel, Michael C., author
Oxford University Press, 2016
Buku Teks
Stephen N. Elliot, Thomas R. Kratochwill, Joan Littlefield Cook, John F. Travers, authors
McGraw-Hill Book , 2000
Buku Teks