Cita APA (7th ed.)

United States. Department of Agriculture & Stefferud, A. (1962). After a hundred years. U.S. Govt. Print. Off.

Cita Chicago (17th ed.)

United States. Department of Agriculture i Alfred Stefferud. After a Hundred Years. Washington: U.S. Govt. Print. Off, 1962.

Cita MLA (9th ed.)

United States. Department of Agriculture i Alfred Stefferud. After a Hundred Years. U.S. Govt. Print. Off, 1962.