Cita APA (7a ed.)

U.S. Department of Agriculture. (1940). Farmers in a changing world: The yearbook vernment printing office. U.S. Government printing office.

Cita Chicago Style (17a ed.)

U.S. Department of Agriculture. Farmers in a Changing World: The Yearbook Vernment Printing Office. Washington: U.S. Government printing office, 1940.

Cita MLA (9a ed.)

U.S. Department of Agriculture. Farmers in a Changing World: The Yearbook Vernment Printing Office. U.S. Government printing office, 1940.