Kumtubtim, P., P. Rithpho, and W. Suwannakeeree. “Factors Affected to Breast Self-Examination Behavior Among Women Used Contraceptive Pills in Chainat Province”. NU Journal of Nursing and Health Sciences, vol. 12, no. 1, Dec. 2018, pp. 106-1, https://he01.tci-thaijo.org/index.php/NurseNu/article/view/161571.