PRASASTI, Cindy Ayu; VITADIAR, Fachrounissa Zein; NUGROHO, Irvan Yusuf; PIMADA, Laila Masruro. Optimization of Tax Revenue in The Time of Covid-19 in Organization of Islamic Cooperation Countries (Case Studies in Egypt, Turkey, Saudi Arabia, and Pakistan). IQTISHODUNA: Jurnal Ekonomi Islam, [S. l.], v. 9, n. 2, p. 181–196, 2020. DOI: 10.36835/iqtishoduna.v9i2.541. Disponível em: https://ejournal.iaisyarifuddin.ac.id/index.php/iqtishoduna/article/view/541. Acesso em: 10 jan. 2026.