เซ็ม สุมาลี, วงษ์นาม ไพรัตน์, and งามมีฤทธิ์ ณัฐกฤตา. “THE CAUSAL FACTORS AFFECT SCIENCE PROCESS SKILLS OF PRATHOM SUKSA VI STUDENTS UNDER THE JURISDICTION OF THE AREA SERVICE OFFICE NAKHON NAYOK PROVINCE”. Journal of Educational Review Faculty of Education in MCU 6, no. 3 (December 28, 2019): 78–88. Accessed December 9, 2022. https://so02.tci-thaijo.org/index.php/EDMCU/article/view/223978.