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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Great Britain. Customs Establishment và 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.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Great Britain. Customs Establishment và 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.
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