APA (7th ed.) Citation

Goscinny, Uderzo, Soreda, M., & Bell, A. (2007). Asterix and the Vikings: The book of the film. Orion.

Chicago Style (17th ed.) Citation

Goscinny, Uderzo, Marlène Soreda, and Anthea Bell. Asterix and the Vikings: The Book of the Film. London: Orion, 2007.

MLA (9th ed.) Citation

Goscinny, et al. Asterix and the Vikings: The Book of the Film. Orion, 2007.