Acton, F. B. E. E. D., & Himmelfarb, G. (1956). Essays on Freedom and Power. Thames & Hudson.
Lua i Stíl Chicago (17ú heag.)Acton, First Baron Emerich E. D., agus Gertrude Himmelfarb. Essays on Freedom and Power. London: Thames & Hudson, 1956.
Lua MLA (8ú heag.)Acton, First Baron Emerich E. D., agus Gertrude Himmelfarb. Essays on Freedom and Power. Thames & Hudson, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.