United States. Technical Committee on Industrial Classification & United States. Bureau of the Budget. Office of Statistical Standards. (1957). Standard industrial classification manual. Executive Office of the President, Bureau of the Budget.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Technical Committee on Industrial Classification و United States. Bureau of the Budget. Office of Statistical Standards. Standard Industrial Classification Manual. Washington, D.C.: Executive Office of the President, Bureau of the Budget, 1957.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Technical Committee on Industrial Classification و United States. Bureau of the Budget. Office of Statistical Standards. Standard Industrial Classification Manual. Executive Office of the President, Bureau of the Budget, 1957.