Staaf, K., & Wiksten, N. (1984). Tree harvesting techniques. M. Nijhoff / W. Junk Publishers.
Lua i Stíl Chicago (17ú heag.)Staaf, K.A.G, agus N.A Wiksten. Tree Harvesting Techniques. Dordrecht: M. Nijhoff / W. Junk Publishers, 1984.
Lua MLA (9ú heag.)Staaf, K.A.G, agus N.A Wiksten. Tree Harvesting Techniques. M. Nijhoff / W. Junk Publishers, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.