Belia, Y.T., Taufan, J. and Fitra, R.R. 2024. Reducing the Negative Behavior of Children with Oppositional Defiant Disorder by Providing Reinforcement Techniques at SLBN 1 Ampek Angkek. Edumaspul: Jurnal Pendidikan. 8, 1 (Mar. 2024). DOI:https://doi.org/10.33487/edumaspul.v8i1.7574.