Kilmeade, B. (2021). The president and the freedom fighter: Abraham Lincoln, Frederick Douglass, and their battle to save America's soul. Sentinel, an imprint of Penguin Random House LLC.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kilmeade, Brian. The President and the Freedom Fighter: Abraham Lincoln, Frederick Douglass, and Their Battle to Save America's Soul. [New York, New York]: Sentinel, an imprint of Penguin Random House LLC, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kilmeade, Brian. The President and the Freedom Fighter: Abraham Lincoln, Frederick Douglass, and Their Battle to Save America's Soul. Sentinel, an imprint of Penguin Random House LLC, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.