Cormick, Phitchanan Mc, and Assoc. Prof. Dr. Sombat Tayraukham. 2019. “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 for Developing the Social and Community 6 (2). Bangkok, Thailand:163-76. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/233169.