Phetyoo , J., K. Kantaruksa, and N. Sansiriphun. “Effect of a Web-Based Instruction Program on Breastfeeding Self-Efficacy Among Pregnant Women”. Nursing Journal CMU, vol. 47, no. 2, May 2020, pp. 156-68, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/241803.