Cowles, Virginia, author
Harper and Brothers, 1953
Buku Teks
Dobbs, Michael, author
Harper Collins, 2002
Buku Teks
Churchill, Randolph S., author
Heinemann, 1966
Buku Teks
Morton, H. V.
Methuen & Co, 1943
Buku Teks
Churchill, Winston, Sir, 1874-1965, author
Cassell, 1944
Buku Teks