Kolom Kitab Tauhid at-Taqwim al-Hijry al-Muwahhad, Risalah Penyatuan Kalender Islam Global by OIF UMSU November 21, 2020
Kolom Pemikiran Prof. Dr. Muhammad Ibrahim al-Hafnawi Tentang Hisab-Rukyat by OIF UMSU September 22, 2020
