Lokollo, E. “The Effectiveness of Cooperative Learning Strategy to Increase the Speaking Skill at the Nineth Grade Students of SMPN 1 Kokoda”. INTERACTION: Jurnal Pendidikan Bahasa, Vol. 9, no. 1, May 2022, pp. 300-8, doi:10.36232/jurnalpendidikanbahasa.v9i1.5988.