Schwarzbein, D. (1999). The Schwarzbein principle: The truth about losing weight, being healthy, and feeling younger. Health Communications.
Chicago-Zitierstil (17. Ausg.)Schwarzbein, Diana. The Schwarzbein Principle: The Truth About Losing Weight, Being Healthy, and Feeling Younger. Deerfield Beach, FL: Health Communications, 1999.
MLA-Zitierstil (9. Ausg.)Schwarzbein, Diana. The Schwarzbein Principle: The Truth About Losing Weight, Being Healthy, and Feeling Younger. Health Communications, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.