APA (7th ed.) Citation

Firth, R., & Church, S. (2010). Knights and castles. Usborne Publishing Ltd..

Chicago Style (17th ed.) Citation

Firth, Rachel, and Sam Church. Knights and Castles. London: Usborne Publishing Ltd., 2010.

MLA (9th ed.) Citation

Firth, Rachel, and Sam Church. Knights and Castles. Usborne Publishing Ltd., 2010.