"'Ideen zur Philosophie der Geschichte der Menschheit' ('Outlines of a Philosophy of the History of Man')". Book by Johann Gottfried Herder, translated by T. Churchill. Book 5, 1803.
"Mark Ruffalo and Maya Forbes on How YouTube and Wes Anderson Helped Shape Infinitely Polar Bear". Interview with Richard Lawson, www.vanityfair.com. June 19, 2015.