Tampang, R.; Alaydrus, S.; Dewi, N. P.; Tandi, J. Determination of Specific and Non-Specific Standardization Parameters for Ethanol Extract of Purple Leaves (Graptophyllum Pictum (L) Griff). jppipa, pendidikan ipa, fisika, biologi, kimia 2024, 10, 6594-6602.