Teena Clouston, author
Wiley, 2010
Buku Teks
Azer, Samy, author
Elsevier, 2008
Buku Teks
Carolyn Jackson, Claire Thurgate
McGraw-Hill, 2011
Buku Teks
Amador, Jose A., author
Anker Publishing, 2006
Buku Teks
edited by Margaret Yelloly and Mary Henkel
Jessica Kingsley Publishers, 1995
Buku Teks