Bureau of Factory Inspection book :
no. 7-B : construction safety standards.

APA Citation

Oklahoma. Dept. of Labor. (1971). Bureau of Factory Inspection book: no. 7-B : construction safety standards. Ed. 1971. Oklahoma City: State of Oklahoma, Dept. of Labor.

MLA Citation

Oklahoma. Dept. of Labor. Bureau of Factory Inspection Book: No. 7-B : Construction Safety Standards. Ed. 1971. Oklahoma City: State of Oklahoma, Dept. of Labor, 1971.

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