Barus, Aguslina Wati Kristina, Wisnu Hidayat, and Henny Arwina Bangun. 2023. “The Habit of Indiscriminate Spitting in Betel Chewing”. Jurnal Prima Medika Sains 5 (2):108-12. https://doi.org/10.34012/jpms.v5i2.4315.