APA (7th ed.) Citation

Winchcombe, S., Leonard, P., & Pascoe, S. (2017). Horizon. BBC Worldwide.

Chicago Style (17th ed.) Citation

Winchcombe, Simon, Peter Leonard, and Sara Pascoe. Horizon. London, England: BBC Worldwide, 2017.

MLA (9th ed.) Citation

Winchcombe, Simon, et al. Horizon. BBC Worldwide, 2017.