Siahaan, H. V. F., J. Tarigan, D. Purba, and I. Hutarabat. “Exploring the Transitivity System Realization in Batak Toba Song Lyrics Discourse: Systemic Functional Linguistic Study”. JOALL (Journal of Applied Linguistics and Literature), vol. 9, no. 2, Oct. 2024, pp. 533-58, doi:10.33369/joall.v9i2.35306.