Mackerras, Colin, author
Cambridge University Press, 1991
Buku Teks
Gear, Jolene, author
Cambridge university press, 2010
Buku Teks
Downes, Colm, author
Cambridge university press, 2009
Buku Teks
Ceramella, Nick, author
Cambridge university press, 2011
Buku Teks
Ibbotson, Mark, author
Cambridge university press, 2010
Buku Teks