Beets, W. C. (1982). Multiple cropping and tropical farming systems. Gower Pub.
芝加哥风格引文Beets, Willem C. Multiple Cropping and Tropical Farming Systems. England: Gower Pub, 1982.
MLA引文Beets, Willem C. Multiple Cropping and Tropical Farming Systems. Gower Pub, 1982.
警告：这些引文格式不一定是100％准确.