Rizal, R., F. . Tambunan, E. V. . Haryanto, L. . Sipahutar, and I. . Sartika. “Application of the LCM Method in Randomizing Colloid and Electrolyte Questions for Basic Chemistry Subjects at SMP N 45 Medan Based on Android”. Indonesian Journal of Contemporary Multidisciplinary Research, vol. 2, no. 1, Feb. 2023, pp. 45-60, doi:10.55927/modern.v2i1.2790.