Zaddana, C. et al. 2022. Formulation Fermented Milk with Prebiotics from Beetroot (Beta vulgaris L.) and Yellow Sweet Potato (Ipomoea batatas L.) for Improvement Viability lactic acid bacteria. Sains Natural: Journal of Biology and Chemistry. 12, 3 (Jul. 2022), 95–102. DOI:https://doi.org/10.31938/jsn.v12i3.397.