Rehana, Anindita, et al. “ Implementation of Hygiene and Environmental Sanitation in Under Five Years Old Diarrhea Patients at Surabaya Primary Health Center”. Jurnal Ilmiah Kesehatan (JIKA), vol. 3, no. 1, Apr. 2021, pp. 1-15, doi:10.36590/jika.v3i1.99.