APA (7th ed.) Citation

Comber, N., Brimblecombe, K., & Baxendale, H. (2018). Without limits. BBC Worldwide.

Chicago Style (17th ed.) Citation

Comber, Nicola, Katie Brimblecombe, and Helen Baxendale. Without Limits. London, England: BBC Worldwide, 2018.

MLA (9th ed.) Citation

Comber, Nicola, et al. Without Limits. BBC Worldwide, 2018.