Scott, Bill, author
Ure Smith , 1976
Buku Teks
Aesop
Grolier Enterprises Corp., 1995
Buku Referensi
Penguin Books, 1980
Buku Teks
Marett, R. R.
Methuen & Co. Ltd., 1920
Buku Teks
Wannan, Bill, author
Viking O'Neil, Penguin Books Australia, 1987
Buku Referensi