edited by Richard Allen
Routledge, 2000
Buku Teks
edited, Peter Catterall
Institute of Contemporary British History, 1990
Buku Teks
Campion, H.
Oxford University Press, 1939
Buku Teks
Macdonald, 1951
Buku Teks
Stout, Hiram Miller
The University of North Carolina Press, 1938
Buku Teks