Mascull, Bill
Harper Collins Pub. , 1995
Buku Teks
Mascull, Bill
HarperCollins Pub , 1996
Buku Teks
Delair , 1981
Buku Teks
Skeat, Walter W., author
The Clarendon Press, 1948
Buku Referensi
editor, William Morris
Houghton Miffiln, 1976
Buku Referensi