Anggraeny, A., Mochzen Gito Resmi, & Syariful Alam. (2022). Designing a mobile sales application at Setra farma pharmacy in the era of the covid-19 using the goal-directed desing method. Jurnal Mantik, 6(3), 2759-2769. https://doi.org/10.35335/mantik.v6i3.2780