Coupland, R. T. (1992). Natural grasslands: Introduction and western hemisphere. Elsevier.
芝加哥风格引文Coupland, Robert T. Natural Grasslands: Introduction and Western Hemisphere. Amsterdam: Elsevier, 1992.
MLA引文Coupland, Robert T. Natural Grasslands: Introduction and Western Hemisphere. Elsevier, 1992.
警告：这些引文格式不一定是100％准确.