Russell, H. (2021). How to be sad: Everything I've learned about getting happier by being sad (First HarperOne edition.). HarperOne, an imprint of HarperCollins Publishers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Russell, Helen. How to Be Sad: Everything I've Learned About Getting Happier by Being Sad. First HarperOne edition. New York, NY: HarperOne, an imprint of HarperCollins Publishers, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Russell, Helen. How to Be Sad: Everything I've Learned About Getting Happier by Being Sad. First HarperOne edition. HarperOne, an imprint of HarperCollins Publishers, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.