Thiangkratok, Wassana, and Wornchanok Chaiyasoonthorn. 2019. “Service Marketing Mix Affecting Consumer Behavior of International Brands Bubble Milk Tea in Bangkok”. The Journal of Integrated Business Innovation and Sustainability (JIBIS) 9 (2). Bangkok, Thailand:181-94. https://so02.tci-thaijo.org/index.php/fam/article/view/233231.