Noriani, N. K., I. W. G. A. E. Putra, and I. N. M. Karmaya. “Risk of in House Cigarette Smoke Exposure to the Premature Birth in Denpasar City”. Public Health and Preventive Medicine Archive, vol. 3, no. 1, July 2015, pp. 55-59, doi:10.53638/phpma.2015.v3.i1.p11.