Suminto, A., A. A. Farizi, N. Kasanah, M. Lesmana, and R. Muzaki. “The Effectiveness of Instagram Social Media As an Effort to Improve the Quality of Tax Services in the COVID-19 Pandemic in KPP Pratama Ponorogo”. Al Tijarah, vol. 7, no. 1, Dec. 2021, pp. 65-73, doi:10.21111/tijarah.v7i1.5563.