Adhitama, T. S., K. Khoirunnisa, and L. Hakim. “Representation of the Message of Faith in the Lyrics of the Song” Sebelum Cahaya " By the Band Letto”. Proceedings of International Conference on Da’wa and Communication, Vol. 1, no. 1, Nov. 2019, pp. 551-6, doi:10.15642/icondac.v1i1.686.