APA (7th ed.) Citation

Great Britain. General Register Office (Scotland) & Great Britain. General Register Office. (1966). Census 1961, Great Britain, summary tables. H.M.S.O..

Chicago Style (17th ed.) Citation

Great Britain. General Register Office (Scotland) and Great Britain. General Register Office. Census 1961, Great Britain, Summary Tables. London: H.M.S.O., 1966.

MLA (9th ed.) Citation

Great Britain. General Register Office (Scotland) and Great Britain. General Register Office. Census 1961, Great Britain, Summary Tables. H.M.S.O., 1966.