APA (7th ed.) Citation

Costner, K. (2016). Billy the kid: New evidence. National Geographic.

Chicago Style (17th ed.) Citation

Costner, Kevin. Billy the Kid: New Evidence. Washington, DC: National Geographic, 2016.

MLA (8th ed.) Citation

Costner, Kevin. Billy the Kid: New Evidence. National Geographic, 2016.

Warning: These citations may not always be 100% accurate.