APA (7th ed.) Citation

Great Britain. Foreign Office, Great Britain. Public Record Office, & National Archives (Great Britain). (1978). Public Record Office FO861: Consulate, Aleppo, Syria, (F.O. 861). General correspondence (1839-1900). Public Record Office.

Chicago Style (17th ed.) Citation

Great Britain. Foreign Office, Great Britain. Public Record Office, and National Archives (Great Britain). Public Record Office FO861: Consulate, Aleppo, Syria, (F.O. 861). General Correspondence (1839-1900). London: Public Record Office, 1978.

MLA (8th ed.) Citation

Great Britain. Foreign Office, et al. Public Record Office FO861: Consulate, Aleppo, Syria, (F.O. 861). General Correspondence (1839-1900). Public Record Office, 1978.