Freyberg, Annabel, author
Laurence King Publishing, ,
Buku Referensi
Made Wijaya, author
Abbeville Press, 2000
Buku Teks
Covington, Vicki, author
Penguin Books, 1990
Buku Teks
Eckbo, Garrett, author
McGraw-Hill, 1978.
Buku Teks
Sweet, Fay, author
Conran Octopus Limited, 2000
Buku Referensi