I. J. LumbanTobing, S. D. Pardede, S. Pardede, T. I. Manurung, and R. Sidabutar, “Improving Literacy and Numeracy Skills at SD Negeri 173616 Lumban Ruhap Through Campus Teaching Program Class 3”, EBJPM, vol. 1, no. 2, pp. 31-35, Dec. 2022.