Kurniawati Agustin, Jasmawati, and Lukman Nulhakim. “The Effect of Health Education via WhatsApp on Knowledge About Exclusive Breastfeeding in Pregnant Women Trimester III at the Salok Api Darat Sub-Puskesmas”. Formosa Journal of Applied Sciences, vol. 2, no. 10, Oct. 2023, pp. 2399-10, doi:10.55927/fjas.v2i10.6632.