Lang, J. M. (2020). Distracted: Why students can't focus and what you can do about it (First edition.). Basic Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lang, James M. Distracted: Why Students Can't Focus and What You Can Do About It. First edition. New York: Basic Books, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lang, James M. Distracted: Why Students Can't Focus and What You Can Do About It. First edition. Basic Books, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.