Letters... (2009). Letters to president Obama: Americans share their hopes and dreams with the first African-American President. Skyhorse Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Letters... Letters to President Obama: Americans Share Their Hopes and Dreams with the First African-American President. Skyhorse Publishing, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Letters... Letters to President Obama: Americans Share Their Hopes and Dreams with the First African-American President. Skyhorse Publishing, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.