Cita APA (7a ed.)

Cowell, C. (2008). How to twist a dragon's tale: The heroic misadventures of Hiccup the Viking (First U.S. edition.). Little Brown and Company.

Cita Chicago Style (17a ed.)

Cowell, Cressida. How to Twist a Dragon's Tale: The Heroic Misadventures of Hiccup the Viking. First U.S. edition. New York: Little Brown and Company, 2008.

Cita MLA (9a ed.)

Cowell, Cressida. How to Twist a Dragon's Tale: The Heroic Misadventures of Hiccup the Viking. First U.S. edition. Little Brown and Company, 2008.