Suthum K, Boonshuyar C, Pacheun OP. Preventive behaviors on secondhand smoke among secondary school pupils, Ratchaburi province. TH. J. of Health Edu. [internet]. 2019 Nov. 18 [cited 2026 Sep. 11];42(2):172-83. available from: https://he01.tci-thaijo.org/index.php/muhed/article/view/224523