Great Britain. Customs Establishment & Great Britain. Public Record Office. (1960). Ledgers of Imports and Exports, America, 1768-1773: Records of imports and exports to and from Britain and its colonies. Public Record Office.
Chicago-referens (17:e uppl.)Great Britain. Customs Establishment och Great Britain. Public Record Office. Ledgers of Imports and Exports, America, 1768-1773: Records of Imports and Exports to and from Britain and Its Colonies. London: Public Record Office, 1960.
MLA-referens (8:e uppl.)Great Britain. Customs Establishment och Great Britain. Public Record Office. Ledgers of Imports and Exports, America, 1768-1773: Records of Imports and Exports to and from Britain and Its Colonies. Public Record Office, 1960.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.