Kennan, George F., 1904-, author
The University of Chicago Press , 1953
Buku Teks
Kennan, George F., 1904-, author
A Mentor Book, 1951
Buku Teks
Bogan, Louise, author
Henry Regnery, 1951
Buku Teks
Ferrell, Robert H., author
W.W. Norton, 1959
Buku Teks
Jones, Howard, author
Franklin Watt , 1985
Buku Teks