APA (7th ed.) Citation

Great Britain. Public Record Office & Penfold, P. A. (1974). Maps and plans in the Public Record Office edited by P.A. Penfold. HMSO.

Chicago Style (17th ed.) Citation

Great Britain. Public Record Office and P. A. Penfold. Maps and Plans in the Public Record Office Edited by P.A. Penfold. London: HMSO, 1974.

MLA (9th ed.) Citation

Great Britain. Public Record Office and P. A. Penfold. Maps and Plans in the Public Record Office Edited by P.A. Penfold. HMSO, 1974.

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