Brush, W. D., Butcher , D., & Collingwood, G. (1974). Knowing your trees (Rev. ed.). The American Forestry Association.
Lua i Stíl Chicago (17ú heag.)Brush, Warren D., Devereux Butcher , agus G.H Collingwood. Knowing Your Trees. Rev. ed. Washington, D.C.: The American Forestry Association, 1974.
Lua MLA (9ú heag.)Brush, Warren D., et al. Knowing Your Trees. Rev. ed. The American Forestry Association, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.