Elista, K. ., R. E. Hutabarat, J. R. Doloksaribu, and D. . Bondar. “THE EFFECT OF USING CLUSTERING TECHNIQUE ON THE STUDENTS ACHIEVEMENT IN WRITING RECOUNT TEXT”. ELT (English Language Teaching Prima Journal), vol. 2, no. 1, Oct. 2020, pp. 59-88, doi:10.34012/elt.v%vi%i.1352.