[1]
D. B. Lumban Gaol, T. E. Sirait, A. E. Situmorang, J. D. Damanik, and H. Herman, “A Socialization Program on the Introduction and Benefits of the TOEFL for Students of SMA Negeri 1 Pematangsiantar”, PMSDU, vol. 3, no. 2, pp. 61–68, Jun. 2025.