Census 1981, Scotland, preliminary report :
(laid before Parliament pursuant to Section 4(1), Census Act 1920).

APA Citation

Great Britain. General Register Office (Scotland). (1981). Census 1981, Scotland, preliminary report: (laid before Parliament pursuant to Section 4(1), Census Act 1920). Edinburgh: H.M.S.O..

MLA Citation

Great Britain. General Register Office (Scotland). Census 1981, Scotland, Preliminary Report: (laid Before Parliament Pursuant to Section 4(1), Census Act 1920). Edinburgh: H.M.S.O., 1981.

Warning: These citations may not always be complete (especially for serials).