Tracy, B. (2001). The 21 success secrets of self-made millionaires: How to achieve financial independence faster and easier than you ever thought possible. Berrett-Koehler Pub..
Citace podle Chicago (17th ed.)Tracy, Brian. The 21 Success Secrets of Self-made Millionaires: How to Achieve Financial Independence Faster and Easier than You Ever Thought Possible. San Francisco: Berrett-Koehler Pub., 2001.
Citace podle MLA (9th ed.)Tracy, Brian. The 21 Success Secrets of Self-made Millionaires: How to Achieve Financial Independence Faster and Easier than You Ever Thought Possible. Berrett-Koehler Pub., 2001.
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