Scott, Harriet Fast, author
National Strategy Information Center, 1983
Buku Teks
Hardy, Charles O., author
Brookings Institution, 1940
Buku Teks
Hammond, R. J. (Richard James), 1911-, author
Stanford University Press, 1954
Buku Teks
Nogee, Joseph L., author
University of Notre Dame Press, 1961
Buku Teks
edited by Leonard D. White
University of Chicago Press, 1945
Buku Teks