T. J. Purba, Peny Ariani, Mutiara Dwi Yanti, Putri Ayu Yessy Ariescha, Friska Ernita Sitorus, and Jekson Martiar Siahaan, “Family support as a predictor of breastfeeding self-efficacy among postpartum mothers”, NHSJ, vol. 6, no. 1, pp. 98–107, Mar. 2026.