I. D. Musyafira dan A. T. Wrastari, “Development of Instrument to Assess Mathematics Learning Result in 2nd Grade Elementary School”, PSP, vol. 2, no. 1, hlm. 272–276, Des 2024, Diakses: 3 November 2025. [Daring]. Tersedia pada: https://psikologi.unair.ac.id/proceeding-series-of-psychology/index.php/psp/article/view/110