APA
United States. Bureau of Census. Department of Commerce, . (1949). A Chapter in population sampling. Washington: U S Government Printing Office.
Chicago
United States. Bureau of Census. Department of Commerce, . 1949. A Chapter in population sampling. Washington: U S Government Printing Office.
Harvard
United States. Bureau of Census. Department of Commerce, . (1949). A Chapter in population sampling. Washington: U S Government Printing Office.
MLA
United States. Bureau of Census. Department of Commerce, . A Chapter in population sampling. Washington: U S Government Printing Office. 1949.