Delair , 1981
Buku Teks
Skeat, Walter W., author
The Clarendon Press, 1948
Buku Referensi
editor in chief John Sinclair
Collins, 1991
Buku Referensi
editor, William Morris
Houghton Miffiln, 1976
Buku Referensi
editor, Laurence Urdang, Stuart Berg Flexner
Random House, 1968
Buku Referensi