Sembiring, P.S.M.A., Elina Gultom, F. and Debora, M. 2023. Penerapan Optimalisasi Keterampilan 4c (Creative Thinking, Critical Thinking And Problem Solving, Communication, Collaboration) Dalam Pembelajaran Contextual Oral Language Skills. Jurnal Ilmiah KORPUS. 7, 3 (Dec. 2023), 391–399. DOI:https://doi.org/10.33369/jik.v7i3.28743.