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.309, e-artnow
William Shakespeare (1855). “The Dramatic Works of William Shakspeare: With a Life of the Poet, and Notes, Original and Selected; Together with a Copious Glossary”, p.409
Alexander Pope (1823). “An Essay on Man: In Four Epistles, to Henry St. John, Lord Bolingbroke : to which is Added, The Universal Prayer, with Other Poems”, p.33
Alexander Pope (1819). “The Poetical Works of Alexander Pope: In Three Volumes Complete, with His Last Corrections, Additions, and Improvements, Together with All His Notes as They Were Delivered to the Editor a Little Before His Death”, p.104