NOER ABIDIN, ENDAH, and EKO HARIYONO. 2019. “ECOPRENEURSHIP ON PROJECT-BASED LEARNING (PBL) : AN APPROACH TO INCREASE LEARNING RESPONSE IN PHYSICS”. IPF: Inovasi Pendidikan Fisika 8 (2). https://ejournal.unesa.ac.id/index.php/inovasi-pendidikan-fisika/article/view/28884.