Susanti, R., S. Sumarlam, D. Djatmika, and M. Rohmadi. “Study of Politeness Strategy of Speech Act Caring Utterances: Discourse Completion Test (DCT) Approach”. Utopía Y Praxis Latinoamericana, Vol. 25, no. 1, May 2020, pp. 282-90, http://www.produccioncientifica.luz.edu.ve/index.php/utopia/article/view/31900.