Burke, Edmund, 1729-1797, author
Bobbs-Merrill, 1955
Buku Teks
Laski, Harold J., author
George Allen and Unwin, 1952
Buku Teks
Salvemini, Gaetano
W.W. Norton & Company, 1962
Buku Teks
Gershoy, Leo, author
Appleton Century Crofts, 1938
Buku Teks
Doyle, William, author
Oxford University Press , 1989
Buku Teks