1. Alfred P. Sloan, Jr., My Years with General Motors, Doubleday, 1963, p. 30.2. Alfred P. Sloan, Jr., My Years with General Motors, Doubleday, 1963, p. 31.3. Alfred P. Sloan, Jr., My Years with General Motors, Doubleday, 1963, p. 125.4. Alfred P. Sloan, Jr., My Years with General Motors, Doubleday, 1963, p. 141.5. Martin S. Fridson, Financial Statement Analysis: A Practitioner's Guide, John Wiley & Sons, 1995, p. 215.