Sholikhakh, Rizqi, and Wikan Budi Utami. “Development Learning Instrument of Algebraic Structure Based on Resitation Task to Improve Activities and Learning Procces”. Unnes Journal of Mathematics Education 6, no. 3 (November 30, 2017): 375-383. Accessed May 6, 2024. http://journal.unnes.ac.id/sju/ujme/article/view/17693.