Himmelfarb, G. (1952). Lord Acton: A study in conscience and politics. Routledge & Paul.
Citazione stile Chigago Style (17a edizione)Himmelfarb, Gertrude. Lord Acton: A Study in Conscience and Politics. London: Routledge & Paul, 1952.
Citatione MLA (9a ed.)Himmelfarb, Gertrude. Lord Acton: A Study in Conscience and Politics. Routledge & Paul, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.