Dwihantoro, A. 2021. Students Team Achievement Division (STAD): Model Pembelajaran Kooperatif untuk Meningkatkan Kerja Sama Peserta Didik. Quadratic: Journal of Innovation and Technology in Mathematics and Mathematics Education. 1, 1 (Apr. 2021), 23–30. DOI:https://doi.org/10.14421/quadratic.2021.011-04.