Merty Karlina Sari, et al. “The The Interpersonal Meaning on the Covid-19 Vaccination News in Indonesia: A Systemic Functional Linguistics Study”. International Journal of Linguistics, Literature and Translation, vol. 4, no. 8, Aug. 2021, pp. 97-102, https://doi.org/10.32996/ijllt.2021.4.8.15.