Weyl, Walter E.
N.Y. Harper & Row , 1964
Buku Teks
Carlyle, Thomas, author
Modern Library, 1934
Buku Teks
Burke, Edmund, 1729-1797, author
J.M.Dent & Sons, 1955
Buku Teks
Palmer, R.R. (Robert Roswell), 1909-2002, author
Princeton University Press, 1964
Buku Teks
Gershoy, Leo, author
Appleton Century Crofts, 1938
Buku Teks