Fitri , A. S. ., S. F. A. . Wati, and E. M. . Safitri. “Improving Administrative Skills of Foster Children at Panti Asuhan Muhammadiyah Surabaya through Learning Microsoft Excel”. Nusantara Science and Technology Proceedings, vol. 2023, no. 33, May 2023, pp. 289-91, doi:10.11594/nstp.2023.3347.