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Plaikaew, C. 2020. The administrative skills of school administrators affecting the Standard Operating Procedures (SOPs) of Internal Quality Assurance (IQA) of schools under the office of Ratchaburi Primary Educational Service Area 2. Journal of Management Science Nakhon Pathom Rajabhat University. 7, 1 (Jun. 2020), 1-15. DOI:https://doi.org/10.14456/jmsnpru.2020.1.