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