Anisa, Anisa. 2022. “Comparative Study of the Ijtihad Method of the Indonesian Ulema Council and Bahtsul Masail Nahdlatul Ulama on the Fatwa of the Astrazeneca Vaccine”. Ulumuddin Journal of Islamic Legal Studies 2 (1):1-20. https://ejournal.umm.ac.id/index.php/ulum/article/view/20852.