Birkhauser, 2006
Buku Teks
Atiyah, P. S.
Clarendon Press, 1986
Buku Teks
Humphrey, Thomas M.
Richmond, Va Federal Reserve Bank of Richmond, 1986
Buku Teks
by George Orwell
Secker and Warburg, 1951
Buku Teks
Trevor-Roper, H.R.
New York Harper & Row 1957
Buku Teks