Bove, Mary, author
Keats Publishing, 2001
Buku Teks
Bove, Mary, author
Keats Publishing, 2001
Buku Teks
Ursell, Amanda, author
A Dorling Kindersley Book, 2000
Buku Teks
Smyth, Angela, author
Thorsons, 1994
Buku Referensi
Anggarwal, Bharat B., author
Sterling Publishing, 2011
Buku Teks