APA (7th ed.) Citation

BBC Worldwide Ltd.,, Rigney, E., & Simm, J. (2002). Natural world. BBC Worldwide.

Chicago Style (17th ed.) Citation

BBC Worldwide Ltd.,, Emma Rigney, and John Simm. Natural World. London, England: BBC Worldwide, 2002.

MLA (9th ed.) Citation

BBC Worldwide Ltd.,, et al. Natural World. BBC Worldwide, 2002.