Cowell, C. (2010). A hero's guide to deadly dragons: The heroic misadventures of Hiccup the Viking as told to Cressida Cowell (First U.S. trade paperback edition.). Little, Brown.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cowell, Cressida. A Hero's Guide to Deadly Dragons: The Heroic Misadventures of Hiccup the Viking as Told to Cressida Cowell. First U.S. trade paperback edition. New York: Little, Brown, 2010.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Cowell, Cressida. A Hero's Guide to Deadly Dragons: The Heroic Misadventures of Hiccup the Viking as Told to Cressida Cowell. First U.S. trade paperback edition. Little, Brown, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.