United States. Foreign Agricultural Service. Foreign agriculture. The Service : [Supt. of Docs., U.S. G.P.O., distributor.
芝加哥风格引文United States. Foreign Agricultural Service. Foreign Agriculture. Washington, D.C.: The Service : [Supt. of Docs., U.S. G.P.O., distributor.
MLA引文United States. Foreign Agricultural Service. Foreign Agriculture. The Service : [Supt. of Docs., U.S. G.P.O., distributor.
警告：这些引文格式不一定是100％准确.