“Analisis Sistem Antrian Multi Chanel Single Phase Dalam Penerapan Protokol Kesehatan Pandemi COVID-19 Di Merdeka Walk Medan ”. G-Tech: Jurnal Teknologi Terapan, vol. 6, no. 1, Apr. 2022, pp. 47-52, https://doi.org/10.33379/gtech.v6i1.1249.