Oktiarmi, Peri, Muhammad Rusdi, and Rayandra Asyhar. “Conceptual Validation of Project Based Learning in Buffer Solution”. PENDIPA Journal of Science Education 7, no. 1 (February 24, 2023): 6–13. Accessed May 7, 2024. https://ejournal.unib.ac.id/pendipa/article/view/25572.