Lucky Herawati, J. Doli Tine Donsu, M. R. Kayani, and M. M. Ali Awan. “The Effect of the Ex-Smoker As an Educator on Smoking Behavior and Vital Lung Capacity of the Suspect Lung Cancer Patients”. International Journal of Emerging Trends in Science and Technology, vol. 7, no. 05, June 2020, pp. 6916-23, doi:10.18535/ijetst/v7i5.01.