Koppen, B. C. P. v. (1998). More jobs per drop: Targeting irrigation to poor women and men. Royal Tropical Institute.
Citazione stile Chigago Style (17a edizione)Koppen, B. C. P. van. More Jobs Per Drop: Targeting Irrigation to Poor Women and Men. Amsterdam: Royal Tropical Institute, 1998.
Citatione MLA (8a ed.)Koppen, B. C. P. van. More Jobs Per Drop: Targeting Irrigation to Poor Women and Men. Royal Tropical Institute, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.