Abdul Mufid, Agus Purwanto, Ahmad Asrof Fitri, Rohmad Adi Yulianto, Masduki Asbari, Fatrilia Rasyi Radita, Yoyok Cahyono. “ Indonesian Hijriah Calendar Unification Urgency in the Perspective of Maqasid Sunnah Nabawiyah and Maqasid Shariah : A Qualitative Literature Review”. International Journal of Advanced Science and Technology, Vol. 29, no. 04, June 2020, pp. 3095 -, http://sersc.org/journals/index.php/IJAST/article/view/24139.