Godfrey, Simon, author
Bloomsbury , 2013
Buku Teks
Churchill, Winston, Sir, 1874-1965, author
Houghton Mifflin, 1959
Buku Teks
Cambridge University Press, 2015
Buku Teks
Budiansky, Stephen
Simon & Schuster, 2000
Buku Teks
Hazelkorn, Ellen, author
Palgrave Macmilan, 2011
Buku Teks