Tracy, B. (2003). Focal point: A proven system to simplify your life, double your productivity, and achieve all your goals (International edition.). AMACOM.
Chicago-viite (17. p.)Tracy, Brian. Focal Point: A Proven System to Simplify Your Life, Double Your Productivity, and Achieve All Your Goals. International edition. New York, NY: AMACOM, 2003.
MLA-viite (9. p.)Tracy, Brian. Focal Point: A Proven System to Simplify Your Life, Double Your Productivity, and Achieve All Your Goals. International edition. AMACOM, 2003.
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