APA (7th ed.) Citation

Great Britain. General Register Office. (1964). Census 1961, England and Wales, age, marital condition and general tables. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. General Register Office. Census 1961, England and Wales, Age, Marital Condition and General Tables. London: H.M.S.O., 1964.

MLA (9th ed.) Citation

Great Britain. General Register Office. Census 1961, England and Wales, Age, Marital Condition and General Tables. H.M.S.O., 1964.