Kane, Charles W., author
Lincoln Town Press, 2009
Buku Teks
McIntyre, Anne, author
Judy Piatkus Publishers, 1997
Buku Teks
Rogers, Carol, author
Hamish Hamilton, 1995
Buku Teks
Wheelwright, Edith Grey, author
Dover pub, 2012
Buku Teks
Tobyn, Graeme, author
Churchill livingstone , 2011
Buku Teks