Mery Chris Isabella Saragih. “Cooperative Group-Based Speech Writing Training Investigation on Student Class VI SD Pulibuah Districts Raya Kahean”. IJCS: International Journal of Community Service 1, no. 1 (June 30, 2022): 99–104. Accessed November 24, 2024. https://ejournal.ipinternasional.com/index.php/ijcs/article/view/179.