Yuliantini, N. N., I. N. R. Aryana, I. G. P. Sutarma, and G. A. O. C. Dewi. “The Implementation of Computer Assisted Language Learning (CALL) to Improve Speaking Ability of Students in Bali State Polytechnic”. OKARA: Jurnal Bahasa Dan Sastra, Vol. 14, no. 2, Nov. 2020, pp. 272-8, doi:10.19105/ojbs.v14i2.3641.