editor, Richard Bowring
Cambridge University Press, 1993
Buku Referensi
edited by Susan Bambrick
Cambridge University Press, 1994
Buku Referensi
Peters, Pam, author
Cambridge University Press, 2006
Buku Referensi
Ceramella, Nick, author
Cambridge University Press, 2008
Multimedia
Downes, Colm, author
Cambridge university press, 2009
Buku Teks