APA (7th ed.) Citation

Great Britain. Foreign Office & Great Britain. Public Record Office. (1978). 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, 1978.

MLA (8th ed.) Citation

Great Britain. Foreign Office and Great Britain. Public Record Office. General Correspondence, Political. Public Record Office, 1978.