Rosenau, Milton D., Jr, author
Lifetime Learning, 1982
Buku Teks
Kuczmarski, Thomas D., author
Prentice-Hall, 1988
Buku Teks
Patricia Grossi; Howard Kunreuther
Springer Science+Business Media, 2005
Buku Teks
edited by Michael Novak
Charles Scribner's Sons, 1968
Buku Teks
Elsevier, 2005
Buku Teks