Ewing, Ethel E., author
Rand McNally & Company, 1962
Buku Teks
Churchill, Winston, Sir, 1874-1965, author
Dodd, Mead, 1956
Buku Teks
Brockelmann, Carl, author
Routledge & Kegan Paul , 1950
Buku Teks
Morton, A.L., author
Victor Gollancz, 1938
Buku Teks
Corry, Stephen, author
Freeman Press, 2011
Buku Teks