Horn, S. (2019). Someday is not a day in the week: 10 hacks to make the rest of your life the best of your life (First edition.). St. Martin's Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Horn, Sam. Someday Is Not a Day in the Week: 10 Hacks to Make the Rest of Your Life the Best of Your Life. First edition. New York: St. Martin's Press, 2019.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Horn, Sam. Someday Is Not a Day in the Week: 10 Hacks to Make the Rest of Your Life the Best of Your Life. First edition. St. Martin's Press, 2019.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.