“The IMPLEMENTATION OF A SMOKE-FREE AREA POLICY IN SMA NEGERI 2 NGANJUK”. INTERNATIONAL JOURNAL OF NURSING AND MIDWIFERY SCIENCE (IJNMS), vol. 4, no. 3, Dec. 2020, pp. 177-86, https://doi.org/10.29082/IJNMS/2020/Vol4/Iss3/311.