edited by Heraldo Munoz and Joseph S. Tulchin
Westview Press, 1984
Buku Teks
McCormick, James M.
Thomson, 2005
Buku Teks
edited by Richard P. Stebbins
Published for the Council on Foreign Relations by Simon and Schuster, [1939-1970], 1963
Buku Teks
edited by Richard P. Stebbins
American Book-stratford Press, 1963
Buku Teks
Tiller, R. Mark
St. Martin's Press , 1997
Buku Teks SO