Andesra, Aan, and Miftahul Jannah. “The Meaning of Istighfar in The Qur’an (Charles Sanders Pierce Semiotic Analysis)”. Jurnal Semiotika-Q: Kajian Ilmu Al-Quran Dan Tafsir, vol. 4, no. 2, Aug. 2024, pp. 445-62, https://doi.org/10.19109/jsq.v4i2.23726.