APA (7th ed.) Zitazioa
Backes, D. (1997). A wilderness within: The life of Sigurd F. Olson. University of Minnesota Press.
Chicago Style (17th ed.) Zitazioa
Backes, David. A Wilderness Within: The Life of Sigurd F. Olson. Minneapolis: University of Minnesota Press, 1997.
MLA (9th ed.) Zitazioa
Backes, David. A Wilderness Within: The Life of Sigurd F. Olson. University of Minnesota Press, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.