Calista Nawangsari, Elizabeth. “Covid-19 Pandemic As An Excuse Of Non-Performance Of Contractual Obligations From Transnational Law Perspective”. Jurnal sosial dan sains 2, no. 3 (March 15, 2022): 404–409. Accessed October 23, 2024. https://sosains.greenvest.co.id/index.php/sosains/article/view/367.