Phunpom, C., W. Phahuwatanakorn, and P. Limruangrong. “Factors Influencing a 6 – Month Exclusive Breastfeeding Period in Working Mothers”. Nursing Science Journal of Thailand, vol. 38, no. 1, Apr. 2020, pp. 47-59, https://he02.tci-thaijo.org/index.php/ns/article/view/239443.