Pramasdyahsari, A.S., Setyawati, R.D. and Albab, I.U. 2019. Connecting university mathematics and school mathematics to address Klein’s double discontinuity: A case of ring theory. Beta: Jurnal Tadris Matematika. 12, 2 (Nov. 2019), 122–132. DOI:https://doi.org/10.20414/betajtm.v12i2.336.