Ceramella, Nick, author
Cambridge university press, 2011
Buku Teks
Ibbotson, Mark, author
Cambridge university press, 2010
Buku Teks
edited by A.W. Ward and A.R. Waller
Macmillan, 1939
Buku Teks
Downes, Colm, author
Cambridge University Press, 2008
Multimedia
Downes, Colm, author
Cambridge University Press, 2008
Multimedia