Mayasari, F. K. D. “Marketing Mix Strategy of RSGM XYZ in Covid-19 Pandemic Era ”. Jurnal Medika Hutama, Vol. 3, no. 02 Januari, Jan. 2022, pp. 2025-31, https://www.jurnalmedikahutama.com/index.php/JMH/article/view/405.