(1)
Bunawan, W.; Mihardi, S.; Sitompul, P.; Ramadhani, I. . Improving Graphical and Numerical Representational Competence Coherence With Laboratory Investigation and Computer to Solve Problem-Solving of Geometry Optical Materials . jppipa, pendidikan ipa, fisika, biologi, kimia 2023, 9, 5055-5061.