Cita APA (7a ed.)

United States. Department of Agriculture. (1949). Trees: The yearbook of agriculture. U. S. Gov. Print. Office.

Cita Chicago Style (17a ed.)

United States. Department of Agriculture. Trees: The Yearbook of Agriculture. Washington D. C.: U. S. Gov. Print. Office, 1949.

Cita MLA (9a ed.)

United States. Department of Agriculture. Trees: The Yearbook of Agriculture. U. S. Gov. Print. Office, 1949.