Kendrich, Ivan, and Bintang Yinke Magdalena Sinaga. 2023. “KNOWLEDGE, ATTITUDE, AND BEHAVIOR TOWARD SMOKING AMONG MEDICAL STUDENTS IN UNIVERSITAS SUMATERA UTARA”. The Indonesian Journal of Public Health 18 (1):1-10. https://doi.org/10.20473/ijph.v18i1.2023.1-10.