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.
Cita Chicago Style (17a ed.)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.
Cita MLA (8a ed.)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.
Precaución: Estas citas no son 100% exactas.