Awang @ Ismail , F. and Muhammad Syukri Bin Razali Zuraimy Ali 2022. Total phenolic content (TPC) in Catharanthus roseus and Clitoria ternatea leaves extract. Journal of Tropical Resources and Sustainable Science (JTRSS) . 10, 1 (Jun. 2022), 58–62. DOI:https://doi.org/10.47253/jtrss.v10i1.888.