Cita APA (7a ed.)

Estados Unidos. Bureau of Plant Industry, Soils, and Agricultural Engineering. (1951). Soil survey manual. Agricultural Research Administration, United States Department of Agriculture.

Cita Chicago Style (17a ed.)

Estados Unidos. Bureau of Plant Industry, Soils, and Agricultural Engineering. Soil Survey Manual. Washington: Agricultural Research Administration, United States Department of Agriculture, 1951.

Cita MLA (9a ed.)

Estados Unidos. Bureau of Plant Industry, Soils, and Agricultural Engineering. Soil Survey Manual. Agricultural Research Administration, United States Department of Agriculture, 1951.