Ruankum, N. “THE DEVELOPMENT OF LEARNING MANAGEMENT PROCESS TO ENHANCE CREATIVE THINKING THROUGH PROJECT BASED LEARNING AND INTEGRATION OF SUFFICIENCY ECONOMY PHILOSOPHY”. Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, vol. 15, no. 2, July 2020, pp. 1-15, https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/239902.