1,597 Nurul Nadia Binti Ya'akob 2019-02-28 http://database.prota.org/PROTAhtml/Indigofera%20tinctoria_En.htm Takawira-Nyenya, R. & Cardon, D. (2005). Indigofera tinctoria L. In: Jansen, P.C.M. & Cardon, D. (Editors). PROTA 3: Dyes and tannins/Colorants et tanins. [CD-Rom]. PROTA, Wageningen, Netherlands. Revised record 27.9.2019.