Saputri, D., Nasution, A.I., Surbakti, M.R.W. and Gani, B.A. 2017. The correlation between pH and flow rate of salivary smokers related to nicotine levels labelled on cigarettes. Dental Journal. 50, 2 (Jun. 2017), 61–65. DOI:https://doi.org/10.20473/j.djmkg.v50.i2.p61-65.