R. J. Siregar, Lisna Khairani Nasution, Elvi Suryani, Dewi Aminasty Siregar, and Fatimah, “Promotion the Dangers of Smoking in Adolescents at SMAN 8 Padang Sidempuan in 2022”, IJCS, vol. 1, no. 2, pp. 233–236, Dec. 2022.