APA (7th ed.) Citation

Great Britain. Foreign Office & Great Britain. Public Record Office. General correspondence, political. Public Record Office.

Chicago Style (17th ed.) Citation

Great Britain. Foreign Office and Great Britain. Public Record Office. General Correspondence, Political. London: Public Record Office.

MLA (8th ed.) Citation

Great Britain. Foreign Office and Great Britain. Public Record Office. General Correspondence, Political. Public Record Office.