Gaya APA

Richardson, E., Mason, D, T. (1983). Forestry advocate : his role in the application of sustained yield management to private and public forest lands . California: Forest History Society.

Gaya MLA

Richardson, Elmo., Mason, David, T.. "Forestry advocate : his role in the application of sustained yield management to private and public forest lands". California: Forest History Society, 1983. Text.