ก๋งอุบล อ. (2017) “Evaluation of Antenatal Care, Maternal and Infant Health, Weingsra District, Suratthani Province”, Region 11 Medical Journal, 31(1), pp. 109–119. available at: https://he02.tci-thaijo.org/index.php/Reg11MedJ/article/view/166818 (accessed: 20 September 2026).