APA (7th ed.) Citation

United States. Dept. of Agriculture. (1949). Trees. U. S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

United States. Dept. of Agriculture. Trees. Washington,: U. S. Govt. Print. Off., 1949.

MLA (8th ed.) Citation

United States. Dept. of Agriculture. Trees. U. S. Govt. Print. Off., 1949.

Warning: These citations may not always be 100% accurate.