Baldwin A. Analysis of the chemical components of the essential oil fraction of betel leaf (piper bettle linn.) and the antibacterial activity test against several types of gram-positive bacteria. Ners [Internet]. 2022 Nov. 30 [cited 2026 Apr. 19];1(1):9-18. Available from: https://journals.iarn.or.id/index.php/ners/article/view/30