อิวาง ว.; แก้วคง ก. Concepts about Basic Astronomy of Students in Elementary Level: A Case Study of a Hmong Ethnic Group. Journal of Education Studies, Bangkok, Thailand, v. 47, n. 3, p. 384–403, 2019. Disponível em: https://so02.tci-thaijo.org/index.php/EDUCU/article/view/218891. Acesso em: 4 may. 2024.