Allen, Frederick Lewis
The big change : America transforms itself, 1900-1950
Bantam Book, 1961
 Buku Teks SO
Allen, Frederick Lewis
Perobahan Besar di Amerika Serikat =The big change : America transforms itself, 1900-1950
Endang, 1955
 Buku Teks SO
Spiegel, Murray R.
Laplace transforms
McGraw-Hill, 1986
 Buku Teks SO
Beers, Clifford Whittingham
A mind that found itself: an autobiography
Doubleday, 1948
 Buku Teks SO
Kennan, George F., 1904-
American diplomacy 1900-1950
University of Chicago Press, 1953
 Buku Teks