Purwadi, Purwadi, Syahruddin Y., Zainal Ilmi, and Alexander Sampeliling. 2022. “Supporting Logistics Management to Anticipate Covid 19 Using the ‘Retail Direct Order’ Concept”. Journal of Telecommunications and the Digital Economy 10 (3):128-48. https://doi.org/10.18080/jtde.v10n3.519.