Oktaviani, D. A., and C. I. Prasasti. “The Physical and Chemical Air Quality, Worker’s Characteristics, and Respiratory Symptoms Among Printing Workers in Surabaya”. JURNAL KESEHATAN LINGKUNGAN, vol. 8, no. 2, July 2016, pp. 195-0, doi:10.20473/jkl.v8i2.2016.195-205.