Levitin, D. J. (2024). I heard there was a secret chord: Music as medicine (First edition.). W.W. Norton and Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Levitin, Daniel J. I Heard There Was a Secret Chord: Music as Medicine. First edition. New York, NY: W.W. Norton and Company, 2024.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Levitin, Daniel J. I Heard There Was a Secret Chord: Music as Medicine. First edition. W.W. Norton and Company, 2024.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.