Lia, Roudloh Muna, Ani Rusilowati, and Wiwi Isnaeni. 2020. “NGSS-Oriented Chemistry Test Instruments: Validity and Reliability Analysis With the Rasch Model”. REID (Research and Evaluation in Education) 6 (1):41-50. https://doi.org/10.21831/reid.v6i1.30112.