"A Personal Credo". Essay by Ansel Adams (1943), first published in "American Annual of Photography," 1944; later published in "Photographers on Photography" edited by Nathan Lyons, 1966, and in "Photography in Print: Writings from 1816 to the Present" edited by Vicki Goldberg, 1988.
Adam Smith (2007). “The Wealth of Nations: An Inquiry Into the Nature and Causes of the Wealth of Nations: With an introduction by Jonathan B. Wight, University of Richmond”, p.439, Harriman House Limited