Portsmouth Polytechnic. Cartographic Unit. (1987). World mapping today. Butterworths.
芝加哥风格引文Portsmouth Polytechnic. Cartographic Unit. World Mapping Today. London: Butterworths, 1987.
MLA引文Portsmouth Polytechnic. Cartographic Unit. World Mapping Today. Butterworths, 1987.
警告：这些引文格式不一定是100％准确.