Cahyasari, A., Budiyanto, M., & Susiyawati, E. (2020). USING PROJECT-BASED LEARNING WORKSHEET WITH WASTE WATER TREATMENT THEME TO PRACTICE STUDENT’ PROBLEM-SOLVING SKILLS. PENSA: E-JURNAL PENDIDIKAN SAINS, 8(2), 110-114. Retrieved from https://ejournal.unesa.ac.id/index.php/pensa/article/view/38368