edited by Michael H. Whitworth
Blackwell, 2007
Buku Teks
Holt, Rinehart and Winston,, 1977
Buku Teks
Williams, Louise Blakeney
Cambridge University Press, 2009
eBooks
Trulove, James Grayson
HarperCollins, 2001
Buku Referensi
edited and introduced by Peter Brooker
Longman, 1992
Buku Teks