Wongwiwatthananukit, Supakit, Preeda Benjanakaskul, Thanapat Songsak, Somporn Suwanamajo, and Viroj Verachai. “Efficacy of Vernonia Cinerea for Smoking Cessation”. Journal of Health Research 23, no. 1 (November 20, 2018): 31–36. Accessed May 10, 2024. https://he01.tci-thaijo.org/index.php/jhealthres/article/view/156327.