alemad, fateh addin najm addin (2017) “EXPOSURE TO SECOND-HAND SMOKE AMONG ADOLESCENT IN SECONDARY SCHOOL STUDENTS IN SANA’A, YEMEN”, International Journal of Public Health Research, 7(1), pp. 783–790. Available at: https://spaj.ukm.my/ijphr/index.php/ijphr/article/view/36 (Accessed: 3 May 2024).