Campbell-Kelly, Martin
ICL : a business and technical history
Clarendon Press, 1989
 Buku Teks
Ilbert, Courtenay
Parliament its history, constitution and practice/ Courtenay Ilbert
Oxford University Press , 1947
 Buku Teks
Williamson, James A.
A notebook of empire history / James A. Williamson
Macmilan and Co,, 1950
 Buku Teks
Summerson, John
Architecture in Britain 1530 to 1830/John Sumerson
Penguin Books, 1958
 Buku Teks
Barker, Ernest
Groot-Brittannie en het Britsche volk
Oxford University Press, 1942
 Buku Teks