Cita APA (7a ed.)
Tweed, W. C. (2010). Uncertain path: A search for the future of national parks. University of California Press.
Cita Chicago Style (17a ed.)
Tweed, William C. Uncertain Path: A Search for the Future of National Parks. Berkeley: University of California Press, 2010.
Cita MLA (9a ed.)
Tweed, William C. Uncertain Path: A Search for the Future of National Parks. University of California Press, 2010.
Precaución: Estas citas no son 100% exactas.