Pile, John F.
McGraw-Hill, 1997
Buku Teks
Boyle, Cailin
Rockport Publishers, 2001
Buku Teks
Poore, Jonathan
Rocport Publisher, 1994
Buku Teks
Simmons, Christopher, 1973-
Rockport Publishers, 2006
Multimedia
Rockport publishers, Inc., 2008
Buku Referensi