Jaceb, E. F.
The fifteenth century : 1399-1485
Clarendon Press, 1961
 Buku Teks
Cook, Chris
A Short history of the liberal party / Chris Cook
Macmillan Press , 1984
 Buku Teks
Cook, Chris
A Short history of the liberal party / Chris Cook
Macmillan Press , 1989
 Buku Teks
Trevelyan, George Macaulay, 1876-1962
Illustrated English social history; Volume three : the eighteenth century
Longmans, Green, 1951
 Buku Teks
Laski, Harold J.
Reflections on the constitution the House of commons, the cabinet, the civil service
Manchester University Press, 1951
 Buku Teks