(1915). Yearbook of the United States Department of Agriculture 1915. Government Printing.
Cita Chicago (17th ed.)Yearbook of the United States Department of Agriculture 1915. Washington: Government Printing, 1915.
Cita MLA (9th ed.)Yearbook of the United States Department of Agriculture 1915. Government Printing, 1915.
Atenció: Aquestes cites poden no estar 100% correctes.