APA (7th ed.) Zitazioa
Widick, R. (2009). Trouble in the forest: California's redwood timber wars. University of Minnesota Press.
Chicago Style (17th ed.) Zitazioa
Widick, Richard. Trouble in the Forest: California's Redwood Timber Wars. Minneapolis: University of Minnesota Press, 2009.
MLA (9th ed.) Zitazioa
Widick, Richard. Trouble in the Forest: California's Redwood Timber Wars. University of Minnesota Press, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.