Plantilla:Cita WHO
«[WHO monographs on selected medicinal plants, volume 1 (1999), volume 2 (2004), volume 3 (2007), volume 4 (2009), WHO Monographs on Medicinal Plants Commonly Used in the Newly Independent States (NIS) (2010)]» (en anglès). Ginebra: World Health Organization, 1999-2010.