Joseph Butler, Stephen L. Darwall (1983). “Five Sermons, Preached at the Rolls Chapel and A Dissertation Upon the Nature of Virtue”, p.48, Hackett Publishing
Joseph Butler (1856). “The analogy of religion, natural and revealed, to the constitution and course of nature: to which are added, two brief dissertations : On personal identity, and On the nature of virtue; and fifteen sermons”, p.432
"President and President Putin Discuss Strong U.S.-Russian Partnership". Statement in press release, georgewbush-whitehouse.archives.gov. February 24, 2005.