Koppen, B. C. P. v. (1998). More jobs per drop: Targeting irrigation to poor women and men. Royal Tropical Institute.
芝加哥风格引文Koppen, B. C. P. van. More Jobs Per Drop: Targeting Irrigation to Poor Women and Men. Amsterdam: Royal Tropical Institute, 1998.
MLA引文Koppen, B. C. P. van. More Jobs Per Drop: Targeting Irrigation to Poor Women and Men. Royal Tropical Institute, 1998.
警告：这些引文格式不一定是100％准确.