Mikhail Sergeevich Gorbachev, Green Cross International (2011). “Mikhail Gorbachev: Prophet of Change : from the Cold War to a Sustainable World”, p.322, CLAIRVIEW BOOKS
Booker T. Washington (1901). “An Autobiography: The Story of My Life and Work, the Original Brought Up-to-date with Over Half a Hundred Full Page Photo and Halftone Engravings and Drawings by Frank Beard”