"Europe - the obligations of liberty". Margaret Thatcher's Winston Churchill Memorial Lecture regarding the UK's contribution to the European Community budget, October 18, 1979.
George Bernard Shaw (2015). “George Bernard Shaw: Collected Articles, Lectures, Essays and Letters: Thoughts and Studies from the Renowned Dramaturge and Author of Mrs. Warren’s Profession, Pygmalion, Arms and The Man, Saint Joan, Caesar and Cleopatra, Androcles And The Lion”, p.282, e-artnow