Hellier, Charles J., author
McGraw-Hill, 2001
Buku Teks
Mortimore, Tilly, author
Whurr Publishers, 2006
Buku Teks
edited by Nikolas Coupland
Wiley-Blackwell, 2010
Buku Teks
McMullin, Rian E, author
W.W. Norton, 2000
Buku Teks
Gibaldi, Joseph, author
The Modern Language Association, 2003
Buku Teks