APA (7th ed.) Citation

Ridout, L., Bowie, B., Sayers, J., & Hawking, S. (2016). Genius by Stephen Hawking. National Geographic.

Chicago Style (17th ed.) Citation

Ridout, Lucie, Ben Bowie, Jane Sayers, and Stephen Hawking. Genius by Stephen Hawking. Washington, D.C.: National Geographic, 2016.

MLA (9th ed.) Citation

Ridout, Lucie, et al. Genius by Stephen Hawking. National Geographic, 2016.