Siahaan, Nova Elisabeth, and Siti Aisah Ginting. 2014. “IMPROVING STUDENTS™ ACHIEVEMENT IN WRITING PROCEDURE TEXT THROUGH THINK-PAIR-SHARE (TPS) TECHNIQUE”. TRANSFORM : Journal of English Language Teaching and Learning 3 (1). North Sumatera, Indonesia. https://doi.org/10.24114/tj.v3i1.1825.