Sujarwanto, Eko, and Suci Prihatiningtyas. “DESIGN AND EVALUATION OF OPTICS CONCEPTUAL ASSESSMENT INSTRUMENTS AS A SOURCE OF INFORMATION ON PHYSICS LEARNING”. Jurnal Pendidikan Fisika, vol. 7, no. 2, Dec. 2018, pp. 84-90, doi:10.22611/jpf.v7i2.10914.