Axelrod, D. I. (1998). The oligocene haynes creek flora of eastern Idaho. University of California Press.
Chicago Style (17th ed.) ZitazioaAxelrod, Daniel I. The Oligocene Haynes Creek Flora of Eastern Idaho. Berkeley: University of California Press, 1998.
MLA (9th ed.) ZitazioaAxelrod, Daniel I. The Oligocene Haynes Creek Flora of Eastern Idaho. University of California Press, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.