Cita APA (7a ed.)
Siebert, S., & Döll, P. (2014). Blue and green virtual water flows. International Food Policy Research Institute.
Cita Chicago Style (17a ed.)
Siebert, Stefan, y Petra Döll. Blue and Green Virtual Water Flows. International Food Policy Research Institute, 2014.
Cita MLA (9a ed.)
Siebert, Stefan, y Petra Döll. Blue and Green Virtual Water Flows. International Food Policy Research Institute, 2014.
Precaución: Estas citas no son 100% exactas.