APA (7th ed.) Citation

Great Britain. Public Record Office. (1967). Maps and plans in the Public Record Office. H.M.S.O.

Chicago Style (17th ed.) Citation

Great Britain. Public Record Office. Maps and Plans in the Public Record Office. London: H.M.S.O, 1967.

MLA (9th ed.) Citation

Great Britain. Public Record Office. Maps and Plans in the Public Record Office. H.M.S.O, 1967.

Warning: These citations may not always be 100% accurate.