APA (7th ed.) Citation

Girardet, A., Sommerfield, A., Sampson, J., & Okonedo, S. (2018). Earth's natural wonders. BBC Worldwide.

Chicago Style (17th ed.) Citation

Girardet, Alexis, Anne Sommerfield, Jobim Sampson, and Sophie Okonedo. Earth's Natural Wonders. London, England: BBC Worldwide, 2018.

MLA (9th ed.) Citation

Girardet, Alexis, et al. Earth's Natural Wonders. BBC Worldwide, 2018.