USDA, NRCS (n.d.). "Plumbago zeylanica". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 8 October 2015.
worldcat.org
G., Miller, Anthony (1988). Plants of Dhofar, the Southern Region of Oman: Traditional, Economic, and Medicinal Uses. Morris, Miranda., Stuart-Smith, Susanna., Oman. Office of the Adviser for Conservation of the Environment. Muscat: Office of the Adviser for Conservation of the Environment, Diwan of Royal Court, Sultanate of Oman. p. 232. ISBN0715708082. OCLC20798112.{{cite book}}: CS1 maint: multiple names: authors list (link)