APA (7th ed.) Citation

Skerry, B., & Sander, L. (2021). Secrets of the whales. National Geographic.

Chicago Style (17th ed.) Citation

Skerry, Brian, and Libby Sander. Secrets of the Whales. Washington, D.C.: National Geographic, 2021.

MLA (9th ed.) Citation

Skerry, Brian, and Libby Sander. Secrets of the Whales. National Geographic, 2021.