Pangsakunyanon W, Yupas Y, Kenaphoom S. Performance Efficiency Development of Policeman in Provincial Police Region 4. JDSC [internet]. 2022 Dec. 28 [cited 2026 Aug. 28];9(3):573-90. available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/256429