APA (7th ed.) Citation

Tweed, W. C. (2010). Uncertain path: A search for the future of national parks. University of California Press.

Chicago Style (17th ed.) Citation

Tweed, William C. Uncertain Path: A Search for the Future of National Parks. Berkeley: University of California Press, 2010.

MLA (9th ed.) Citation

Tweed, William C. Uncertain Path: A Search for the Future of National Parks. University of California Press, 2010.