Lenny Brida, M. Nababan, Riyadi Santosa, and Tri Wiratno. “Modulating Meaning in Discourse: A Systemic Functional Linguistics Approach to Graduation in A Motivational Book”. Forum for Linguistic Studies, vol. 7, no. 5, May 2025, pp. 417–427, doi:10.30564/fls.v7i5.9394.