Zulfa Nur Azizah, Diyah Fatmasari, Noor Pramono, Rr Sri Endang Puji Astuti, and Melyana Nurul Widyawati, “Effect of purple sweet potato extract supplement on hypertensive pregnant women”, ijamscr, vol. 2021, no. 9, pp. 720–724, Dec. 2021.