Henein, Michael, Shereen Azer, Joseph Khirey, Ahmes Pahor, and Nabil Isshak. “The Infrequently Sung ‘a’ Instead of ‘A’ in ‘Alleluia’ According to the Coptic Tradition”. TEACH - Journal of Christian Studies 1 (November 30, 2021). Accessed November 21, 2024. https://jcs.teach.eu.com/index.php/teach/article/view/8.