Wilhide, Elizabeth, author
Conran Octopus, 1998
Buku Referensi
Fatmah, author
Gramedia Pustaka Utama, 2013
Buku Teks
Clifton-Mogg, Caroline, author
Pageone , 2001
Buku Referensi
Spencer, andrea, author
Sandstone Publishing , 1997
Buku Referensi
Lowell, Christopher, author
Discovery Books, 2000
Buku Teks