APA (7th ed.) Citation

Bone, E., Cooper, J., Dawes, W., Edmonds, H., & Haggerty, T. (2009). Penguins. Usborne Pub. Ltd.

Chicago Style (17th ed.) Citation

Bone, Emily, Jenny Cooper, Will Dawes, Helen Edmonds, and Tim Haggerty. Penguins. London: Usborne Pub. Ltd, 2009.

MLA (9th ed.) Citation

Bone, Emily, et al. Penguins. Usborne Pub. Ltd, 2009.