บุญภิละ น. Designing and developing of pearl decorative souvenir; Ban Nonglad, Thonnalab sub-district, Ban Dung District, Udon Thani province. Mahachula Academic Journal, Bangkok, Thailand, v. 6, n. ฉบับพิเศษ, p. 51–65, 2019. Disponível em: https://so04.tci-thaijo.org/index.php/JMA/article/view/181005. Acesso em: 5 may. 2024.