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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Technical Committee on Industrial Classification এবং 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.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited States. Technical Committee on Industrial Classification এবং United States. Bureau of the Budget. Office of Statistical Standards. Standard Industrial Classification Manual. Executive Office of the President, Bureau of the Budget, 1957.