APA (7th ed.) Citation

Koenig, D. B. (2009). The national parks: America's best idea. Florentine Films and WETA.

Chicago Style (17th ed.) Citation

Koenig, Darlene B. The National Parks: America's Best Idea. Washington, DC: Florentine Films and WETA, 2009.

MLA (8th ed.) Citation

Koenig, Darlene B. The National Parks: America's Best Idea. Florentine Films and WETA, 2009.

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