Wilkinson, R. G., & Pickett, K. (2019). The inner level: How more equal societies reduce stress, restore sanity and improve everyone's well-being. Penguin Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wilkinson, Richard G., و Kate Pickett. The Inner Level: How More Equal Societies Reduce Stress, Restore Sanity and Improve Everyone's Well-being. New York: Penguin Press, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wilkinson, Richard G., و Kate Pickett. The Inner Level: How More Equal Societies Reduce Stress, Restore Sanity and Improve Everyone's Well-being. Penguin Press, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.