A. H. Lubis, M. D. Dasopang, F. Ramadhini, and E. M. Dalimunthe, “Augmented reality pictorial storybook: How does it influence on elementary school mathematics anxiety?”, Prem. Educ. J. Pendidik. Dasar dan Pembelajaran, vol. 12, no. 1, pp. 41 – 53, Jun. 2022.