Spanier, J. W. (1967). World politics in an age of revolution. Praeger.
Lua i Stíl Chicago (17ú heag.)Spanier, John W. World Politics in an Age of Revolution. New York: Praeger, 1967.
Lua MLA (9ú heag.)Spanier, John W. World Politics in an Age of Revolution. Praeger, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.