Simmons, Christopher, 1973-, author
Rockport, 2006
Buku Referensi
Harvey, Alan R., author
Oxford University Press, 2016
eBooks
Kalbe, 2006
Buku Teks
Sutton, Tina, author
Page One Publishing, 2008
Buku Referensi
Aw, Tash, author
Penguin Group, 2005
Buku Teks