1. https://www.kemkes.go.id/article/view/20010700001/severe-pneumonia-of-unknown-cause-detected-in-china.html
2. UNICEF, IRC, & WHO. 2020. Key Messages and Actions for COVID-19 Prevention and Control in Schools. Diperoleh dari https://www.who.int/docs/default-source/coronaviruse/key-messages-and-actions-for-covid-19 -prevention-and-control-in-schools-march-2020.pdf?sfvrsn=baf81d52_4.
3. Kementerian Kesehatan. (2020). Keputusan Kesehatan Nomor: HK.01.07/MENKES/382/2020 tentang Protokol Kesehatan Bagi Masyarakat di Tempat dan Fasilitas Umum.
4. https://www.bps.go.id/pressrelease/2021/02/05/1811/ekonomi-indonesia-2020-turun-sebesar-2-07-persen--c-to-c-.
5. Kementerian Koordinator Bidang Perekonomian. (2020). Ekonomi Berbasis Inovasi dan Teknologi Pendukungnya. Lecturer Series dalam Forum Dekan Teknik Indonesia, 12 Juni 2020.