Kamid, K. ., D. A. Kurniawan, R. Perdana, Y. D. Citra, A. A. Rahman, and P. Fadillah. “Mathematical Process Skills and Cooperation Character of Elementary School Students on Simple Flat Building Materials”. International Journal of Innovative Research in Education, vol. 10, no. 2, Dec. 2023, pp. 132-45, doi:10.18844/ijire.v10i2.9146.