APA (7th ed.) Citation

Dutcher, J., Dutcher, J., & Manfull, J. (2013). The hidden life of wolves. National Geographic Society.

Chicago Style (17th ed.) Citation

Dutcher, Jim, Jamie Dutcher, and James Manfull. The Hidden Life of Wolves. Washington: National Geographic Society, 2013.

MLA (9th ed.) Citation

Dutcher, Jim, et al. The Hidden Life of Wolves. National Geographic Society, 2013.