APA

Haddock H. H., Cowell C., . (2007). How to Speak Dragonese. London: Hodder.

Chicago

Haddock Hiccup Horrendous, Cowell Cressida, . 2007. How to Speak Dragonese. London: Hodder.

Harvard

Haddock H. H., Cowell C., . (2007). How to Speak Dragonese. London: Hodder.

MLA

Haddock Hiccup Horrendous, Cowell Cressida, . How to Speak Dragonese. London: Hodder. 2007.