Frederiksen, H. D. (1992). Drought planning and water efficien-: Cy implications in water resources management. The World Bank.
Citazione stile Chigago Style (17a edizione)Frederiksen, Harald D. Drought Planning and Water Efficien-: Cy Implications in Water Resources Management. Washington D.C: The World Bank, 1992.
Citatione MLA (9a ed.)Frederiksen, Harald D. Drought Planning and Water Efficien-: Cy Implications in Water Resources Management. The World Bank, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.