Arifian, Imam Setya, Vitri Widyaningsih, and Hanung Prasetya. “The Effect of Active Smoking of Pregnant Women on Premature Birth: A Meta Analysis”. Journal of Maternal and Child Health 6, no. 1 (January 16, 2021): 95–107. Accessed April 28, 2024. https://thejmch.com/index.php/thejmch/article/view/546.