Abraham Lincoln, Stephen Arnold Douglas (1860). “Political Debates Between Hon. Abraham Lincoln and Hon. Stephen A. Douglas, in the Celebrated Campaign of 1858 in Illinois: Including the Preceding Speeches of Each at Chicago, Springfield, Etc., Also the Two Great Speeches of Mr. Lincoln in Ohio, in 1859, as Carefully Prepared by the Reporter of Each Party and Published at the Times of Their Delivery”, p.5
Benjamin Franklin (1817). “Some Account of the Pennsylvania Hospital: From Its First Rise, to the Beginning of the Fifth Month, Called May, 1754”, p.33
Pope Benedict XVI's Letter to the Ecumenical Patriarch of Constantinople on the Occasion of the Seventh Symposium of the Religion, Science and the Environment Movement, w2.vatican.va. September 1, 2007.