Tilbury, Alex, author
Cambridge University Press, 2011
Multimedia
Clementson, Theresa, author
Cambridge University Press, 2011
Multimedia
Spears, Richard A., author
Erlangga, 1999
Buku Referensi
Redman, Stuart
Jakarta : Erlangga, 2001, 2001
Buku Teks
Black, Henry Campbell, author
West Publishing, 1990
Buku Teks