Hard Work Quotes - Page 11
1939 'Pense es d'un Biologiste', collected inThe Substance of Man (translated by Irma Brandeis,1962).
Arnold Schwarzenegger (2012). “Arnold: The Education of a Bodybuilder”, p.30, Simon and Schuster
Thomas J. Stanley, William D. Danko (1996). “The Millionaire Next Door: The Surprising Secrets of America's Wealthy”, p.2, Government Institutes