"The Character of Physical Law". Richard P. Feynman's Messenger Lectures at Cornell University (November 1964), later quoted in his book "The Character of Physical Law" (Chapter 1 "The Law of Gravitation", p. 13), www.youtube.com. 1965.
"Quincy Jones Recalls "Freaking Out" at Michael Jackson's Death and His Private Nickname for the Star". Interview with Stephen Galloway, www.hollywoodreporter.com. April 11, 2015.