S. Shaharuddin, A. Othman, and W. Nor I’zzah Wan Mohd Zain, “Effect of Post-Harvest Preservation and Extraction Methods on Antioxidant Properties of Alternanthera Sessilis Red”, IJET, vol. 7, no. 4.14, pp. 267–272, Dec. 2019, doi: 10.14419/ijet.v7i4.14.27579.