Haryanti, Septina Sri, Kartini Herlina, and Abdurrahman Abdurrahman. “The Learning Program Validity of Using the ExPRession Model to Stimulate students’ Systems Thinking and Numeracy Skills”. Momentum: Physics Education Journal 7, no. 1 (January 31, 2023): 164–177. Accessed December 26, 2024. http://ejournal.unikama.ac.id/index.php/momentum/article/view/8096.