RATNAWATI, DIAH. THE EFFECT OF USING CO-OP CO-OP TECHNIQUE IN TEACHING WRITING NARRATIVE TEXT TO THE TENTH GRADERS OF SMAN 3 SIDOARJO. RETAIN : Journal of Research in English Language Teaching, [S. l.], v. 3, n. 2, 2015. Disponível em: https://ejournal.unesa.ac.id/index.php/retain/article/view/12391. Acesso em: 27 jun. 2025.