Staaf, K., & Wiksten, N. (1984). Tree harvesting techniques. M. Nijhoff / W. Junk Publishers.
Chicago Style aipamenaStaaf, K.A.G, and N.A Wiksten. Tree Harvesting Techniques. Dordrecht: M. Nijhoff / W. Junk Publishers, 1984.
MLA aipamenaStaaf, K.A.G, and N.A Wiksten. Tree Harvesting Techniques. M. Nijhoff / W. Junk Publishers, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.