Cowell, C. (2010). How to twist a dragon's tale: The heroic misadventures of Hiccup the Viking (First U.S. trade paperback edition.). Little, Brown.
Cita Chicago Style (17a ed.)Cowell, Cressida. How to Twist a Dragon's Tale: The Heroic Misadventures of Hiccup the Viking. First U.S. trade paperback edition. New York: Little, Brown, 2010.
Cita MLA (8a ed.)Cowell, Cressida. How to Twist a Dragon's Tale: The Heroic Misadventures of Hiccup the Viking. First U.S. trade paperback edition. Little, Brown, 2010.
Precaución: Estas citas no son 100% exactas.