APA (7th ed.) Citation

Little, E. L., & Honkala, B. H. (1976). Trees and shrubs of the United States: A bibliography for identification. Forest Service, US Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Little, Elbert Luther, and Barbara H. Honkala. Trees and Shrubs of the United States: A Bibliography for Identification. Washington: Forest Service, US Dept. of Agriculture, 1976.

MLA (9th ed.) Citation

Little, Elbert Luther, and Barbara H. Honkala. Trees and Shrubs of the United States: A Bibliography for Identification. Forest Service, US Dept. of Agriculture, 1976.