Skeat, Walter W., author
The Clarendon Press, 1948
Buku Referensi
editor, William Morris
Houghton Miffiln, 1976
Buku Referensi
edited by Somers Gill
Frederick Warne, [1948]
Buku Referensi
Delair , 1981
Buku Teks
editor in chief John Sinclair
Collins, 1991
Buku Referensi