ทิพย์คำ พ., วรรณไพศาล เ. and ทิพยมณฑล จ. (2019) “PROBLEM - BASED LEARNING MANAGEMENT TO PROMOTE GOODCITIZENSHIP FOR SECONDARY SCHOOL STUDENTS”, Journal of MCU Nakhondhat. Nakhon Si Thammarat, Thailand, 6(7), pp. 3285–3298. Available at: https://so03.tci-thaijo.org/index.php/JMND/article/view/201995 (Accessed: 24 April 2024).