Widiastiningsih, N.L.P., Yudiana, K. dan Widiana, I.W. 2021. Procedural Knowledge Instruments for Grade IV Elementary School. Journal of Education Reseach and Evaluation. 5, 4 (Agu 2021), 498–506. DOI:https://doi.org/10.23887/jere.v5i3.34338.