Purba, Kezia, I Ketut Junitha, & Ni Nyoman Wirasiti.
" THE DNA QUANTIFICATION IN SMOKER STUDENTS AND NON- SMOKING AT STATE UNIVERSITY OF MEDAN, MEDAN TEMBUNG DISTRICT, MEDAN CITY, NORTH SUMATRA PROVINCE." <em>SIMBIOSIS</em> [Online], 10.2 (2022): 173-185. Web. 20 Apr. 2024