Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.24, St. Martin's Press
Speech on the Occasion of the Opening of the Governor General's Canadian Leadership Conference by Adrienne Clarkson in Winnipeg, archive.gg.ca. May 07, 2004.
Robert Hunter, David G. Dodd (2005). “The Complete Annotated Grateful Dead Lyrics: The Collected Lyrics of Robert Hunter and John Barlow, Lyrics to All Original Songs, with Selected Traditional and Cover Songs”, p.230, Simon and Schuster