Silalahi, R. M. P., W. Santoso, and B. S. Hutauruk. “English As a Lingua Franca in an Indonesian Multilingual Setting: Pre-Service English Teachers’ Perceptions”. REiLA : Journal of Research and Innovation in Language, Vol. 5, no. 2, Aug. 2023, pp. 144-60, doi:10.31849/reila.v5i2.13611.