Yodclaew L. Service Innovation and Marketing Innovation That Influence the Decision to Use Fitness Center Services in Mueang District, Khon Kaen Province. JDSC [internet]. 2025 Apr. 1 [cited 2026 Oct. 13];12(1):443-62. available from: https://so03.tci-thaijo.org/index.php/rdirmu/article/view/286342