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.
Παραπομπή σε μορφή Chicago (17η εκδ.)United States. Technical Committee on Industrial Classification και 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.
Παραπομπή σε μορφή MLA (9th εκδ.)United States. Technical Committee on Industrial Classification και United States. Bureau of the Budget. Office of Statistical Standards. Standard Industrial Classification Manual. Executive Office of the President, Bureau of the Budget, 1957.