Não informado. (2018). Overseas Trade Statistics of the United Kingdom. Her Majesty's Stationery Office.
Citação do estilo Chicago (17ª ed.)Não informado. Overseas Trade Statistics of the United Kingdom. London: Her Majesty's Stationery Office, 2018.
Citação MLA (8ª ed.)Não informado. Overseas Trade Statistics of the United Kingdom. Her Majesty's Stationery Office, 2018.
警告：這些引文格式不一定是100％准確.