Bloch, E. (1986). The principle of hope (1st American ed.). MIT Press.
Lua i Stíl Chicago (17ú heag.)Bloch, Ernst. The Principle of Hope. 1st American ed. Cambridge, Mass.: MIT Press, 1986.
Lua MLA (9ú heag.)Bloch, Ernst. The Principle of Hope. 1st American ed. MIT Press, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.