APA (7e ed.) Bronvermelding

Brush, W. D., Butcher , D., & Collingwood, G. (1974). Knowing your trees (Rev. ed.). The American Forestry Association.

Chicago (17e ed.) Bronvermelding

Brush, Warren D., Devereux Butcher , en G.H Collingwood. Knowing Your Trees. Rev. ed. Washington, D.C.: The American Forestry Association, 1974.

MLA (9e ed.) Bronvermelding

Brush, Warren D., et al. Knowing Your Trees. Rev. ed. The American Forestry Association, 1974.