Smil, V., & Perring, S. (2022). How the world really works: The science behind how we got here and where we're going (Unabridged.). Penguin Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Smil, Vaclav, و Stephen Perring. How the World Really Works: The Science Behind How We Got Here and Where We're Going. Unabridged. New York: Penguin Audio, 2022.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Smil, Vaclav, و Stephen Perring. How the World Really Works: The Science Behind How We Got Here and Where We're Going. Unabridged. Penguin Audio, 2022.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.