Purba, K., 		Junitha, I., & 		Wirasiti, N.
(2022).
 THE DNA QUANTIFICATION IN SMOKER STUDENTS AND NON- SMOKING AT STATE UNIVERSITY OF MEDAN, MEDAN TEMBUNG DISTRICT, MEDAN CITY, NORTH SUMATRA PROVINCE.
<em>SIMBIOSIS, 10</em>(2), 173-185.
doi:10.24843/JSIMBIOSIS.2022.v10.i02.p05