Lumbiganon, P., M. Panamonta, S. Pninwatsoontorn, and M. Laopaiboon. “Validity of the Birth Weight and Mode of Delivery Data Obtained from Questionnaire”. Srinagarind Medical Journal, vol. 1, no. 3, Nov. 2013, pp. 187-90, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13273.