Hobsbawm Eric. (1994). Age of Extremes , 1914 - 1991. Abacus.
Lua i Stíl Chicago (17ú heag.)Hobsbawm Eric. Age of Extremes , 1914 - 1991. London: Abacus, 1994.
Lua MLA (9ú heag.)Hobsbawm Eric. Age of Extremes , 1914 - 1991. Abacus, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.