Cita APA (7th ed.)
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..
Cita 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.
Cita 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.
Atenció: Aquestes cites poden no estar 100% correctes.