สุทธิมาร อ. ปก. Research and Development Journal Suan Sunandha Rajabhat University, Bangkok, Thailand, v. 8, n. 1, 2019. Disponível em: https://so05.tci-thaijo.org/index.php/irdssru/article/view/214489. Acesso em: 2 ต.ค. 2026.