APA (7th ed.) Citation

Gibney, S., Curtis, I., & Miller, T. (2015). Horrible histories. BBC Worldwide.

Chicago Style (17th ed.) Citation

Gibney, Simon, Ian Curtis, and Tom Miller. Horrible Histories. London, England: BBC Worldwide, 2015.

MLA (9th ed.) Citation

Gibney, Simon, et al. Horrible Histories. BBC Worldwide, 2015.