Ningsih, D., & Rohmah, M. (2021). Developing an Educational Package through Handbook of How to Express Breast Milk for Working Mother at Sumberejo Banyuputih Village in Situbondo. STRADA Jurnal Ilmiah Kesehatan, 10(1), 1297-1305. https://doi.org/10.30994/sjik.v10i1.613