Cormick, P. M., and A. P. D. S. Tayraukham. “Construction of Learning Diagnostic Tests in the Mathematics Learning Numbers and Numerical Work for Prathomsueksa 6 Student under the Office of Nong Bua Lamphu Primary Educational Service Area Zone 1”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 6, no. 2, Dec. 2019, pp. 163-76, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/233169.