APA (7th ed.) Citation

Rule, G. K. (1941). Soil conservation districts: In action on the land. U.S. Dep. of Agriculture.

Chicago Style (17th ed.) Citation

Rule, Glenn K. Soil Conservation Districts: In Action on the Land. Washington, DC: U.S. Dep. of Agriculture, 1941.

MLA (9th ed.) Citation

Rule, Glenn K. Soil Conservation Districts: In Action on the Land. U.S. Dep. of Agriculture, 1941.