Kholifa, Mahmud. “Pengaruh Ekstrak Etanol Daun Sirih Merah (Piper Crocatum Ruiz & Pav) Terhadap Hambatan Pertumbuhan Bakteri Streptococcus Mutans”. Prosiding University Research Colloquium, Feb. 2018, pp. 17-23, https://repository.urecol.org/index.php/proceeding/article/view/5.