Silalahi, Dumaris E., et al. “Guided Of Project Based Learning On Seminar On ELT Subject At FKIP Universitas HKBP Nemmensen Pematangsiantar”. Gema Wiralodra, vol. 15, no. 2, Aug. 2024, pp. 777-85, doi:10.31943/gw.v15i2.722.