[1]
K. Salim and D. H. Tiawa, “The Use of Instrument to Measure Student’s Understanding of the Concept of Light Refraction Using Animation Slide Show for Secondary School Students”, Int J Innov Educ Res, vol. 2, no. 10, pp. 169–176, Oct. 2014, doi: 10.31686/ijier.vol2.iss10.257.