APA (7th ed.) Citation

Johnson, A. G. (1921). Wheat scab and its control. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Johnson, Aaron G. Wheat Scab and Its Control. Washington, D.C: U.S. Dept. of Agriculture, 1921.

MLA (9th ed.) Citation

Johnson, Aaron G. Wheat Scab and Its Control. U.S. Dept. of Agriculture, 1921.