หงษ์สุวรรณ ส.; ชัยอมรไพศาล ก. Marketing Mix Factors Influencing the Decision of Selecting Upgrade Academy Language Institution in Chiang Mai. PAYAP UNIVERSITY JOURNAL, [S. l.], v. 28, n. 1, p. 151–166, 2018. DOI: 10.14456/pyuj.2018.9. Disponível em: https://so05.tci-thaijo.org/index.php/pyu/article/view/141493. Acesso em: 1 may. 2024.