M. Guffar Harahap. “STRATEGI MANAJEMEN BISNIS DI ERA PANDEMI COVID-19 DENGAN ANALISIS SWOT”. INTERNATIONAL, Journal of Sharia Business Management, vol. 1, no. 1, September 2022, hlm. 45-65, https://e-journalbarokahpublisher.com/index.php/jurnalmanajemenbisnissyariah/article/view/19.