Jones, Howard
Franklin Watts, 1985
Buku Teks
Morris, Richard B.
Van Nostrand Reinhold, 1955
Buku Teks
Cornell Paperbacks, 1971
Buku Teks
Kennan, George F., 1904-
The University of Chicago Press , 1953
Buku Teks
Kennan, George F., 1904-
A Mentor Book, 1951
Buku Teks