Tolle, E., Friedman, R. S., & Riccio, F. (2008). Milton's secret: An adventure of discovery through then, when, and the power of now. Hampton Roads Pub..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tolle, Eckhart, Robert S. Friedman, و Frank Riccio. Milton's Secret: An Adventure of Discovery Through Then, When, and the Power of Now. Charlottesville, Va.: Hampton Roads Pub., 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tolle, Eckhart, et al. Milton's Secret: An Adventure of Discovery Through Then, When, and the Power of Now. Hampton Roads Pub., 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.