Pimpaporn, N. . (2023). THE EFFECT OF POSITIVE COMMUNICATION DEVELOPMENT COURSE AT WORK OF OPERATIONAL EMPLOYEES IN INDUSTRIAL WORK. JOURNAL OF HUMANITIES AND SOCIAL SCIENCES SONGKHLA RAJABHAT UNIVERSITY, 5(2), 127–165. Retrieved from https://so03.tci-thaijo.org/index.php/husoskru/article/view/267918