Olarn , Jiratchaya, and Montira Tadaamnuaychai. 2023. “Effectiveness of Facebook Advertising for a New Brand of Food Supplement for Plant: A Case Study of Chitonical”. Dusit Thani College Journal 17 (1):157-73. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/267448.