APA (7th ed.) Citation

United States. Department of Agriculture. Office of the Secretary. (1919). Perennial rye-grass (Lolium perenne). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Agriculture. Office of the Secretary. Perennial Rye-grass (Lolium Perenne). Washington: U.S. GPO, 1919.

MLA (9th ed.) Citation

United States. Department of Agriculture. Office of the Secretary. Perennial Rye-grass (Lolium Perenne). U.S. GPO, 1919.

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