APA (7th ed.) Citation

Santos, J. F., Pulido-Calvo, I., & Portela, M. M. (2011). Spatial and temporal variability of droughts in Portugal.

Chicago Style (17th ed.) Citation

Santos, João Filipe, Inmaculada Pulido-Calvo, and Maria Manuela Portela. Spatial and Temporal Variability of Droughts in Portugal. 2011.

MLA (8th ed.) Citation

Santos, João Filipe, et al. Spatial and Temporal Variability of Droughts in Portugal. 2011.