Cowell,Cressida. (2009). how to break a dragon's heart.
Cita Chicago (17th ed.)Cowell,Cressida. How to Break a Dragon's Heart. great britain, 2009.
Cita MLA (8th ed.)Cowell,Cressida. How to Break a Dragon's Heart. 2009.
Atenció: Aquestes cites poden no estar 100% correctes.