Bastin, John
The Clarendon Press , 1957
Buku Teks
Bradbrook, Muriel Clara, 1909-1993
Longmans, 1958
Koleksi Publik
Barley, Nigel
Penguin books , 2002
Buku Teks
Alssid, Michael William, 1927-
Twayne, 1967
Buku Teks SO
Blunden, Edmund
Macmillan's Pocket Lib., 1951
Buku Teks SO