Ningsih, Ziana Dia, et al. “Pengenceran Sabun Cair Cuci Tangan Terhadap Angka Lempeng Total Bakteri (Altb) Telapak Tangan”. Jurnal Analis Medika Biosains (JAMBS), vol. 5, no. 1, July 2019, pp. 50-54, doi:10.32807/jambs.v5i1.104.