Kennan, George F., 1904-
The University of Chicago Press , 1953
Buku Teks
Bogan, Louise
Henry Regnery, 1951
Buku Teks
Ferrell, Robert H.
W.W. Norton, 1959
Buku Teks
Jones, Howard
Franklin Watt , 1985
Buku Teks
Graham, Malbone W.
Johns Hopkins Press, 1948
Buku Teks