Ilyas, I., N. Farid, N. Junita, and D. Islamiah. “enentuan ilai PF rim ulit pel analagi Malus ylvestris ill.) engan etode pektrofotometri -is”. urnal romotif reventif, ol. 6, no. 3, June 2023, pp. 465-71, doi:10.47650/jpp.v6i3.734.