Ganderton, Lucinda, author
Page One, 2002
Buku Referensi
Bliss, Sara, author
Page One Publishing, 2003
Buku Referensi
A Ward Lock Book, 1997
Buku Referensi
Storey, Sally, author
Quadrille Publishing Limited, 2000
Buku Referensi
Aude, Karen, author
Rockport Publishers, 1999.
Buku Teks