1970 census of population. Subject reports. Marital status
MLA
1970 Census of Population. Washington, D.C.: U.S. Bureau of the Census , 1972
APA, 7th edition
(1972). 1970 census of population. Washington, D.C.: U.S. Bureau of the Census
Chicago, 17th edition
1970 census of population. Washington, D.C.: U.S. Bureau of the Census , 1972