Fitriyano, Gema, Rudi Septian Herfindo, and Erna Kurnia Wati. “Effect of Ethanol Concentration and Extraction Time on Piperine Yield from Piper Retrofractum Vahl”. Sainteks 23, no. 1 (May 16, 2026): 21–29. Accessed June 4, 2026. http://jurnalnasional.ump.ac.id/index.php/SAINTEKS/article/view/30337.