SIRITHANYAPORN, S. ส่วนหน้า. Mahachula Academic Journal, Bangkok, Thailand, v. 2, n. 2, p. ส่วนหน้า(1–12), 2018. Disponível em: https://so04.tci-thaijo.org/index.php/JMA/article/view/141586. Acesso em: 7 feb. 2023.