2,731 Nurul Jannah Abdullah 2019-11-04 http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=241000005 Flora of China. (nd). 2b. Brassica rapa var. oleifera de Candolle, Syst. Nat. 2: 591. 1821. Retrieved from http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=241000005