Ernawati, Yuri Pratiwi Utami , Abdul Halim Umar,.
" Analysis of Total Anthocyanin Content on Ethanol Extract of Purple Sweet Potato (Ipomoea batatas L.) and Purple Yam (Dioscoreaalata L.) with Differential pH Method." <em>Journal of Pharmaceutical and Medicinal Sciences</em> [Online], 1.2 (2016): n. pag. Web.  3 May. 2024