Harrington, M. (1990). Socialism: Past and future. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Harrington, Michael. Socialism: Past and Future. New York: Penguin Books, 1990.
Lua MLA (9ú heag.)Harrington, Michael. Socialism: Past and Future. Penguin Books, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.