Gaya APA

Cowell, C. (2013). How To Train Your Dragon (Book 11): How to Betray a Dragon's Hero . Great Britain: Little, Brown Books for Young Readers.

Gaya MLA

Cowell, Cressida. "How To Train Your Dragon (Book 11): How to Betray a Dragon's Hero". Great Britain: Little, Brown Books for Young Readers, 2013. Novel.