Samjaji S, Miko H, Widyagdo A. Development of a promotional media model using puzzle media as an effort to increase knowledge of dental and oral health maintenance in Preschool Children. jchat [Internet]. 2024Mar.20 [cited 2024May18];2(1):70-4. Available from: https://ejournal.poltekkesjakarta1.ac.id/index.php/jchat/article/view/1569