APA (7th ed.) Citation

United States. Department of Agriculture. Office of the Secretary & May, C. (1931). Dutch elm disease. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Office of the Secretary and Curtis May. Dutch Elm Disease. Washington: U.S. GPO, 1931.

MLA (9th ed.) Citation

United States. Department of Agriculture. Office of the Secretary and Curtis May. Dutch Elm Disease. U.S. GPO, 1931.

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