Collier, Leonard Dawson, author
St. Paul's House Warwick Lane, 1973
Buku Teks
Bennett, Jeffrey O.
Pearson - Addison Wesley, 2009
Multimedia
Verlinden, Jay, author
Wadsworth/Thomson Learning, 2005
Buku Teks
Cambridge University Press, 2004
Buku Teks
Rogers, Peter
FA. Davis, 1977
Buku Teks