Williams, F., & Zeller, E. W. (2017). The nature fix: Why nature makes us happier, healthier, and more creative (Unabridged.). HighBridge Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Williams, Florence, و Emily Woo Zeller. The Nature Fix: Why Nature Makes Us Happier, Healthier, and More Creative. Unabridged. Prince Frederick: HighBridge Audio, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Williams, Florence, و Emily Woo Zeller. The Nature Fix: Why Nature Makes Us Happier, Healthier, and More Creative. Unabridged. HighBridge Audio, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.