Lippmann, Walter
Little, Brown, 1943.
Buku Teks SO
Perkins, Dexter
Little, Brown, 1944
Buku Teks SO
Berding, Andrew
Double Day, 1962
Buku Teks SO
Jones, Joseph Marion
Macmillan, 1944
Buku Teks
Hyde, Charles Cheney, 1873-1952
Little, Brown, 1947, 1951
Buku Teks SO