United States. Department of Agriculture & Hayes, J. (1980). Cutting Energy Costs. U.S. Dept. of Agriculture : For sale by the Supt. of Docs., U.S. G.P.O..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Department of Agriculture و Jack Hayes. Cutting Energy Costs. [Washington, D.C.]: U.S. Dept. of Agriculture : For sale by the Supt. of Docs., U.S. G.P.O., 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Department of Agriculture و Jack Hayes. Cutting Energy Costs. U.S. Dept. of Agriculture : For sale by the Supt. of Docs., U.S. G.P.O., 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.