"My Credo". Speech to the German League of Human Rights, Berlin (Autumn 1932); as published in "Einstein: A Life in Science" by Michael White and John Gribbin, 1994.
Robert Louis Stevenson (2015). “Collected Memoirs, Travel Sketches and Island Literature of Robert Louis Stevenson: Autobiographical Writings and Essays by the prolific Scottish novelist, poet and travel writer, author of Treasure Island, The Strange Case of Dr. Jekyll and Mr. Hyde, Kidnapped & Catriona”, p.259, e-artnow