APA (7e ed.) Bronvermelding

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..

Chicago (17e ed.) Bronvermelding

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.

MLA (9e ed.) Bronvermelding

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.