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3. Robert G. Hagstrom. The Essential Buffett, Timeless Principles for the New Economy. New York: John Wiley & Sons, 2001.

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5. Peter Lynch & John Rothchild. Beating the Street. New York: Simon & Schuster, 1994.

6. Robert G. Hagstrom. The Warren Buffett Way. Hoboken, NJ: John Wiley & Sons, 2005.

7. Robert G. Hagstrom. The Warren Buffett Portfolio: Mastering the Power of Focus Investment Strategy. New York, 1999 John Wiley & Sonc Inc.