Herbert, Xavier
F.W. Cheshire, 1963
Buku Teks
Marshall, Alan, 1902-1984, author
Chesire, 1963
Buku Teks
Dallek, Robert, author
Little, Brown & Co., 2003
Buku Teks
edited by Colin Thiele and Ian Mudle
Rigby, 1970
Buku Teks
Baxter, James K., author
Oxford University Press, 1981
Buku Teks