Standard industrial classification manual, 1972 :
1977 supplement.

APA Citation

United States. Office of Federal Statistical Policy and Standards., United States. Office of Management and Budget. Statistical Policy Division., United States. Technical Committee on Industrial Classification. (1977). Standard industrial classification manual, 1972: 1977 supplement. [Washington]: U. S. Dept. of Commerce, Office of Federal Statistical Polic and Standards .

MLA Citation

United States. Office of Federal Statistical Policy and Standards, United States. Office of Management and Budget. Statistical Policy Division, and United States. Technical Committee on Industrial Classification. Standard Industrial Classification Manual, 1972: 1977 Supplement. [Washington]: U. S. Dept. of Commerce, Office of Federal Statistical Polic and Standards , 1977.

Warning: These citations may not always be complete (especially for serials).