Rangkuti, Alpan Noor Habib, et al. “Analysis of Speech Acts of Ustadz Adi Hidayat’s Lecture on Success and Happiness: A Study of Locutionary, Illocutionary, and Perlocutionary Acts”. Jurnal Bahasa Indonesia Prima (BIP), vol. 7, no. 2, Sept. 2025, pp. 182-94, doi:10.34012/bip.v7i2.7473.