La, Hoang, Hung Hoang, Vu Dien, and Chau Ngo. “Validity and Reliability of Child Oral Health Impact Profile Among Vietnamese Children from 12 to 15 Years Old”. Science & Technology Development Journal - Health Sciences 2, no. 2 (November 20, 2021): 281-288. Accessed January 27, 2022. http://stdjhs.scienceandtechnology.com.vn/index.php/stdjhs/article/view/488.