APA (7th ed.) Citation

Little & Viereck. (1976). ATLAS of United States trees. United States Department of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

Little and Viereck. ATLAS of United States Trees. Washington: United States Department of Agriculture, Forest Service, 1976.

MLA (9th ed.) Citation

Little and Viereck. ATLAS of United States Trees. United States Department of Agriculture, Forest Service, 1976.

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