Kusaeri, Kusaeri, Sutini Sutini, Suparto Suparto, and Faiqotul Wardah. 2019. “The Validity and Inter-Rater Reliability of Project Assessment in Mathematics Learning”. Beta: Jurnal Tadris Matematika 12 (1), 1-13. https://doi.org/10.20414/betajtm.v12i1.266.