"Neil deGrasse Tyson and Executive Producer Ann Druyan Talk COSMOS: A SPACETIME ODYSSEY, Public Appetite for Science, and More". Interview with Christina Radish, collider.com. March 17, 2014.
Speech before American Bar Association, New York (August 8, 1978), reported in "What They Said in 1978" by Alan F. Pater, Jason R. Pate, (p. 168), 1979.
Ian Hacking (2006). “The Emergence of Probability: A Philosophical Study of Early Ideas about Probability, Induction and Statistical Inference”, p.126, Cambridge University Press