ปัญจรัตนากร ด, ธีระภูธร รด, ณ ตะกั่วทุ่ง รด. Develop a blended learning system using collaborative learning and cognitive tools to enhance an analytical thinking abilities in marketing research for undergraduate students. ptujournal [Internet]. 2018 May 31 [cited 2024 May 3];10(1):66-74. Available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/179523