Treratviapong, Taneenat, Mariam Boonma, and Kannika Wuthikamolchai. 2011. “Perinatal Mortality in Taksin Hospital, Bangkok Metropolitan Administration”. Vajira Medical Journal : Journal of Urban Medicine 50 (2):103-10. https://he02.tci-thaijo.org/index.php/VMED/article/view/280.