Ginsberg, M. (1953). The Idea of Progress: A Revaluation. Methuen & Co. Ltd..
Lua i Stíl Chicago (17ú heag.)Ginsberg, Morris. The Idea of Progress: A Revaluation. London: Methuen & Co. Ltd., 1953.
Lua MLA (8ú heag.)Ginsberg, Morris. The Idea of Progress: A Revaluation. Methuen & Co. Ltd., 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.