Pozgar, George D.
Jones & Bartllett, 2010
Buku Teks
Guido, Ginny Wacker
Prentice-Hall, 2006
Buku Teks
Andry Indrady, examiner
F.A. Davis , 2004
Buku Teks
edited by Richard Hugman, David Smith
Routledge, 1996
Buku Teks
edited by Andrew Belsey and Ruth Chadwick
Routledge, 1995
Buku Teks