Susilowati, Khanza Lolita Astya, and Ulinnuha Syaiful Bachri. 2021. “The Role of Ampo As an Adsorbent for Reducing Peroxide Value in Used Cooking Oil ”. Nusantara Science and Technology Proceedings, April, 22-29. https://doi.org/10.11594/nstp.2021.0905.