Saaty, Thomas L.
Embracing the future : meeting the challenge of our changing world
Praeger, 1990
 Buku Teks
The world economy: a global challenge
United Nations Departemen of Public Information, 1990
 Buku Teks
Handelman, Howard
The challenge of third world development
Pearson/Prentice Hall, 2006
 Buku Teks
Nevid, Jeffrey S.
Abnormal psychology in a changing world
Pearson Education International, 2008
 Buku Teks
the changing world of the American military
Westview Press, 1978
 Buku Teks