Albert Einstein's speech made in honor of Thomas Mann, when Mann was given the Einstein Prize given by the Jewish Forum (January 1939), as quoted in Abraham Pais "Einstein Lived Here" (p. 214), 1994.
Lord Philip Dormer Stanhope Chesterfield, Philip Dormer Stanhope Earl of Chesterfield (1855). “The Works of Lord Chesterfield: Including His Letters to His Son, Etc : to which is Prefixed, an Original Life of the Author”, p.224
"Comic-Con: George Blagden and Gustaf Skarsgard Talk VIKINGS, Favorite Moments from Season 1, and Tease Season 2". Interview with Connie Allen, collider.com. July 21, 2013.