Taufiq Subagio, R., A. A. Fauzan, Rafi`M., B. T. Ramadhan, and A. Surachman. “Design and Usability Evaluation of an Android-Based Point of Sales Application Using Goal-Directed Design”. Jurnal Sistem Cerdas, Vol. 9, no. 1, May 2026, pp. 131 -43, doi:10.37396/jsc.v9i1.660.