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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoker, 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoker, 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.
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