Schlesinger, A. M. (1962). The vital center: The politics of freedom (Sentry ed.). The Riverside Press.
Lua i Stíl Chicago (17ú heag.)Schlesinger, Arthur Meier. The Vital Center: The Politics of Freedom. Sentry ed. Cambridge: The Riverside Press, 1962.
Lua MLA (9ú heag.)Schlesinger, Arthur Meier. The Vital Center: The Politics of Freedom. Sentry ed. The Riverside Press, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.