Asdianto, Irisun, and Hadiwinarto Hadiwinarto. “Implementation Approach Contextual Teaching and Learning to Enhance Cooperation and Achievement Students (Studies in History Lesson in Class XI SMAN 2 Kaur)”. Jurnal Pendidikan Tambusai, vol. 5, no. 3, Dec. 2021, pp. 9525-34, doi:10.31004/jptam.v5i3.2515.