Mulyanti, S., Sukmawati, W. and Tarkin, N. E. H. (2022) “Development of items in Acid-Base Identification Experiments Using Natural Materials: Validity Test with Rasch Model Analysis”, Phenomenon : Jurnal Pendidikan MIPA, 12(1), pp. 17–30. doi: 10.21580/phen.2022.12.1.10703.