Sari, Fatma, Ummul Habibah Hasyim, Gema Fitriyano, and Rezi Salsabila Ramadhani. 2022. “PENGARUH WAKTU EKSTRAKSI ULTRASONIK DAUN SIRIH HIJAU (Piper Betle L) TERHADAP RENDEMEN Dan SIFAT MIKROBA SEBAGAI ZAT TAMBAH GEL ANTISEPTIK: The Effect Of Ultrasonic Extraction Of Betel Leaves (Piper Betle L) On The Rendement And Properties Of Microbials As Additional Substances Of Antiseptic Gels”. Agroindustrial Technology Journal 6 (2):118-25. https://atj.journal.unida.gontor.ac.id/index.php/atj/article/view/47.