Trevelyan, George Macaulay, 1876-1962, author
Longmans, Green, 1945
Buku Teks
Chesterton, G. K. (Gilbert Keith), 1874-1936, author
Chatto , 1951
Buku Teks
Stephen, Sir James Fitzjames, author
Routledge/Thoemmes Press, 1996
Buku Teks
Clapham, John, Sir, author
University Press , 1944
Buku Teks
Larson, Laurence M., author
Holt , 1926
Buku Teks