Mertasari, L., W. Sugandini, and K. E. Giri. “The Implications of Breastfeeding Self-Efficacy on Prelacteal Feeding in First Week of Birth”. International Journal of Natural Science and Engineering, vol. 5, no. 3, Oct. 2021, pp. 120-8, doi:10.23887/ijnse.v5i3.39895.