Benjamin Graham, David Dodd (2009). “Security Analysis, Sixth Edition, Part V - Analysis of The Income Account. The Earnings Factor in Common-Stock Valuation”, p.405, McGraw Hill Professional
Benjamin Graham, Institute of Chartered Financial Analysts, Financial Analysts Research Foundation (1974). “The Renaissance of value: the proceedings of a seminar on the economy, interest rates, portfolio management, and bonds vs common stocks, September 18, 1974”
Benjamin Graham, Institute of Chartered Financial Analysts, Financial Analysts Research Foundation (1974). “The Renaissance of value: the proceedings of a seminar on the economy, interest rates, portfolio management, and bonds vs common stocks, September 18, 1974”
"The Intelligent Investor: The Classic Text on Value Investing". Book by Benjamin Graham. Chapter II, The Investor and Stock-Market Fluctuations, p. 38, 1949.