Soft computing with industrial applications: recent trends in research and development, vol. 5
TSI Pres, 1996
 Buku Teks SO
Wesson, Robert G.
Foreign policy for a new age
Houghton mifflin, 1977
 Buku Teks
Wesson, Robert G.
Foreign policy for a new age
Houghton Miffiln, 1977
 Buku Teks SO
Perkins, Dexter
The American approach to foreign policy
Harvard University Press, 1954
 Buku Teks SO
Lipsey, Robert E.
Price and quantity trends in the foreign trade of the United States / by Robert E. Lipsey
Princeton University Press , 1963
 Buku Teks