APA
U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917, . (1947). Hours of work and output. Washington DC: U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917.
Chicago
U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917, . 1947. Hours of work and output. Washington DC: U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917.
Harvard
U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917, . (1947). Hours of work and output. Washington DC: U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917.
MLA
U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917, . Hours of work and output. Washington DC: U.S. Department of Labor. Bureau of Labor Statistics. Bulletin nr 917. 1947.