Cunningham, Lawrence
BlackWell, 2004
Buku Teks
Duchet-Suchaux, Gaston
Flammarion, 1994
Buku Referensi
Cecil, Lord David
Clarendom Press, 1951
Buku Teks
Knowles, David
At University Press, 1963
Buku Teks
Long, Edward LeRoy
Oxford University Press , 1967
Buku Teks