Erika Hutapea, Injen Pardamean Butar-Butar, and Herlina Hotmadia Sianipar, “The Impact of Learning Motivation and Learning Activeness for the Result of Social Subject in SMP Negeri 7 Pematang Siantar”, IJIST, vol. 1, no. 5, pp. 703–714, Nov. 2023.