Brewer, E. Cobham
New York, Harper Brothers
Buku Referensi
revised by Ivor H. Evans
Cassell & Company, 1975
Buku Referensi
Phythian, B. A.
Hodder & Stoughton, 1993
Buku Referensi
Aesop
Grolier Enterprises Corp., 1995
Buku Referensi
Roberts, Russell D.
Pearson Prentice Hall, 2007
Buku Teks