Mulyanti, Sri, Wati Sukmawati, and Nur Elisa Hawa Tarkin. “Development of Items in Acid-Base Identification Experiments Using Natural Materials: Validity Test With Rasch Model Analysis”. Phenomenon : Jurnal Pendidikan MIPA 12, no. 1 (July 31, 2022): 17–30. Accessed April 2, 2025. https://journal.walisongo.ac.id/index.php/Phenomenon/article/view/10703.