Siagian, Nico Gilbert Nathaniel, Mamfalutin Mamfalutin, and Iskandar Muda. “Business Activities in Pandemic of COVID-19 Era, the Source of Accounting Information and How Do Know How Well Our Business Is Doing?”. International journal of health sciences 6, no. S1 (April 1, 2022): 2693–2702. Accessed June 12, 2026. https://sciencescholar.us/journal/index.php/ijhs/article/view/5194.