APA (7th ed.) Citation

United States. Office of Education. (1938). Good references on conservation of trees and forests, for use in elementary schools. [s.n.].

Chicago Style (17th ed.) Citation

United States. Office of Education. Good References on Conservation of Trees and Forests, for Use in Elementary Schools. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Office of Education. Good References on Conservation of Trees and Forests, for Use in Elementary Schools. [s.n.], 1938.