Sir Joshua Reynolds, Edward Malone (1867). “The Works of Sir Joshua Reynolds: Containing His Discourses, Idlers, A Journey to Flanders and Holland, and His Commentary on Du Fresnoy's Art of Painting; to which is Prefixed an Account of the Life and Writings of the Author by Edward Malone”, p.27
Robert Storr, Gerhard Richter, Museum of Modern Art (New York, N.Y.) (2002). “Gerhard Richter: Forty Years of Painting”, p.67, The Museum of Modern Art