Roker, A. (2018). Ruthless tide: The heroes and villains of the Johnstown flood, America's astonishing gilded age disaster (First edition.). William Morrow, an imprint of HarperCollinsPublishers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Roker, Al. Ruthless Tide: The Heroes and Villains of the Johnstown Flood, America's Astonishing Gilded Age Disaster. First edition. New York, NY: William Morrow, an imprint of HarperCollinsPublishers, 2018.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Roker, Al. Ruthless Tide: The Heroes and Villains of the Johnstown Flood, America's Astonishing Gilded Age Disaster. First edition. William Morrow, an imprint of HarperCollinsPublishers, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.